Science and Reality
5. Contingence and Determinism
I do not intend to treat here the question of the contingence of the laws of nature, which is evidently insoluble, and on which so much has already been written. I only wish to call attention to what different meanings have been given to this word, contingence, and how advantageous1 it would be to distinguish them.
If we look at any particular law, we may be certain in advance that it can only be approximate. It is, in fact, deduced from experimental verifications, and these verifications were and could be only approximate. We should always expect that more precise measurements will oblige us to add new terms to our formulas; this is what has happened, for instance, in the case of Mariotte’s law.
Moreover the statement of any law is necessarily incomplete. This enunciation2 should comprise the enumeration3 of all the antecedents in virtue4 of which a given consequent can happen. I should first describe all the conditions of the experiment to be made and the law would then be stated: If all the conditions are fulfilled, the phenomenon will happen.
But we shall be sure of not having forgotten any of these conditions only when we shall have described the state of the entire universe at the instant t; all the parts of this universe may, in fact, exercise an influence more or less great on the phenomenon which must happen at the instant t + dt.
Now it is clear that such a description could not be found in the enunciation of the law; besides, if it were made, the law would become incapable5 of application; if one required so many conditions, there would be very little chance of their ever being all realized at any moment.
Then as one can never be certain of not having forgotten some essential condition, it can not be said: If such and such conditions are realized, such a phenomenon will occur; it can only be said: If such and such conditions are realized, it is probable that such a phenomenon will occur, very nearly.
Take the law of gravitation, which is the least imperfect of all known laws. It enables us to foresee the motions of the planets. When I use it, for instance, to calculate the orbit of Saturn6, I neglect the action of the stars, and in doing so I am certain of not deceiving myself, because I know that these stars are too far away for their action to be sensible.
I announce, then, with a quasi-certitude that the coordinates7 of Saturn at such an hour will be comprised between such and such limits. Yet is that certitude absolute? Could there not exist in the universe some gigantic mass, much greater than that of all the known stars and whose action could make itself felt at great distances? That mass might be animated8 by a colossal9 velocity10, and after having circulated from all time at such distances that its influence had remained hitherto insensible to us, it might come all at once to pass near us. Surely it would produce in our solar system enormous perturbations that we could not have foreseen. All that can be said is that such an event is wholly improbable, and then, instead of saying: Saturn will be near such a point of the heavens, we must limit ourselves to saying: Saturn will probably be near such a point of the heavens. Although this probability may be practically equivalent to certainty, it is only a probability.
For all these reasons, no particular law will ever be more than approximate and probable. Scientists have never failed to recognize this truth; only they believe, right or wrong, that every law may be replaced by another closer and more probable, that this new law will itself be only provisional, but that the same movement can continue indefinitely, so that science in progressing will possess laws more and more probable, that the approximation will end by differing as little as you choose from exactitude and the probability from certitude.
If the scientists who think thus are right, still could it be said that the laws of nature are contingent11, even though each law, taken in particular, may be qualified12 as contingent? Or must one require, before concluding the contingence of the natural laws, that this progress have an end, that the scientist finish some day by being arrested in his search for a closer and closer approximation, and that, beyond a certain limit, he thereafter meet in nature only caprice?
In the conception of which I have just spoken (and which I shall call the scientific conception), every law is only a statement imperfect and provisional, but it must one day be replaced by another, a superior law, of which it is only a crude image. No place therefore remains13 for the intervention14 of a free will.
You know that in this theory all the properties of gases are explained by a simple hypothesis; it is supposed that all the gaseous16 molecules17 move in every direction with great velocities19 and that they follow rectilineal paths which are disturbed only when one molecule18 passes very near the sides of the vessel20 or another molecule. The effects our crude senses enable us to observe are the mean effects, and in these means, the great deviations21 compensate22, or at least it is very improbable that they do not compensate; so that the observable phenomena23 follow simple laws such as that of Mariotte or of Gay-Lussac. But this compensation of deviations is only probable. The molecules incessantly24 change place and in these continual displacements25 the figures they form pass successively through all possible combinations. Singly these combinations are very numerous; almost all are in conformity26 with Mariotte’s law, only a few deviate27 from it. These also will happen, only it would be necessary to wait a long time for them. If a gas were observed during a sufficiently28 long time it would certainly be finally seen to deviate, for a very short time, from Mariotte’s law. How long would it be necessary to wait? If it were desired to calculate the probable number of years, it would be found that this number is so great that to write only the number of places of figures employed would still require half a score places of figures. No matter; enough that it may be done.
I do not care to discuss here the value of this theory. It is evident that if it be adopted, Mariotte’s law will thereafter appear only as contingent, since a day will come when it will not be true. And yet, think you the partisans29 of the kinetic theory are adversaries30 of determinism? Far from it; they are the most ultra of mechanists. Their molecules follow rigid31 paths, from which they depart only under the influence of forces which vary with the distance, following a perfectly32 determinate law. There remains in their system not the smallest place either for freedom, or for an evolutionary33 factor, properly so-called, or for anything whatever that could be called contingence. I add, to avoid mistake, that neither is there any evolution of Mariotte’s law itself; it ceases to be true after I know not how many centuries; but at the end of a fraction of a second it again becomes true and that for an incalculable number of centuries.
And since I have pronounced the word evolution, let us clear away another mistake. It is often said: Who knows whether the laws do not evolve and whether we shall not one day discover that they were not at the Carboniferous epoch34 what they are to-day? What are we to understand by that? What we think we know about the past state of our globe, we deduce from its present state. And how is this deduction35 made? It is by means of laws supposed known. The law, being a relation between the antecedent and the consequent, enables us equally well to deduce the consequent from the antecedent, that is, to foresee the future, and to deduce the antecedent from the consequent, that is, to conclude from the present to the past. The astronomer36 who knows the present situation of the stars can from it deduce their future situation by Newton’s law, and this is what he does when he constructs ephemerides; and he can equally deduce from it their past situation. The calculations he thus can make can not teach him that Newton’s law will cease to be true in the future, since this law is precisely37 his point of departure; not more can they tell him it was not true in the past. Still, in what concerns the future, his ephemerides can one day be tested and our descendants will perhaps recognize that they were false. But in what concerns the past, the geologic38 past which had no witnesses, the results of his calculation, like those of all speculations39 where we seek to deduce the past from the present, escape by their very nature every species of test. So that if the laws of nature were not the same in the Carboniferous age as at the present epoch, we shall never be able to know it, since we can know nothing of this age, only what we deduce from the hypothesis of the permanence of these laws.
Perhaps it will be said that this hypothesis might lead to contradictory40 results and that we shall be obliged to abandon it. Thus, in what concerns the origin of life, we may conclude that there have always been living beings, since the present world shows us always life springing from life; and we may also conclude that there have not always been, since the application of the existent laws of physics to the present state of our globe teaches us that there was a time when this globe was so warm that life on it was impossible. But contradictions of this sort can always be removed in two ways; it may be supposed that the actual laws of nature are not exactly what we have assumed; or else it may be supposed that the laws of nature actually are what we have assumed, but that it has not always been so.
It is evident that the actual laws will never be sufficiently well known for us not to be able to adopt the first of these two solutions and for us to be constrained41 to infer the evolution of natural laws.
On the other hand, suppose such an evolution; assume, if you wish, that humanity lasts sufficiently long for this evolution to have witnesses. The same antecedent shall produce, for instance, different consequents at the Carboniferous epoch and at the Quaternary. That evidently means that the antecedents are closely alike; if all the circumstances were identical, the Carboniferous epoch would be indistinguishable from the Quaternary. Evidently this is not what is supposed. What remains is that such antecedent, accompanied by such accessory circumstance, produces such consequent; and that the same antecedent, accompanied by such other accessory circumstance, produces such other consequent. Time does not enter into the affair.
The law, such as ill-informed science would have stated it, and which would have affirmed that this antecedent always produces this consequent, without taking account of the accessory circumstances, this law, which was only approximate and probable, must be replaced by another law more approximate and more probable, which brings in these accessory circumstances. We always come back, therefore, to that same process which we have analyzed42 above, and if humanity should discover something of this sort, it would not say that it is the laws which have evoluted, but the circumstances which have changed.
Here, therefore, are several different senses of the word contingence. M. LeRoy retains them all and he does not sufficiently distinguish them, but he introduces a new one. Experimental laws are only approximate, and if some appear to us as exact, it is because we have artificially transformed them into what I have above called a principle. We have made this transformation43 freely, and as the caprice which has determined44 us to make it is something eminently45 contingent, we have communicated this contingence to the law itself. It is in this sense that we have the right to say that determinism supposes freedom, since it is freely that we become determinists. Perhaps it will be found that this is to give large scope to nominalism and that the introduction of this new sense of the word contingence will not help much to solve all those questions which naturally arise and of which we have just been speaking.
I do not at all wish to investigate here the foundations of the principle of induction46; I know very well that I should not succeed; it is as difficult to justify47 this principle as to get on without it. I only wish to show how scientists apply it and are forced to apply it.
When the same antecedent recurs49, the same consequent must likewise recur48; such is the ordinary statement. But reduced to these terms this principle could be of no use. For one to be able to say that the same antecedent recurred50, it would be necessary for the circumstances all to be reproduced, since no one is absolutely indifferent, and for them to be exactly reproduced. And, as that will never happen, the principle can have no application.
We should therefore modify the enunciation and say: If an antecedent A has once produced a consequent B, an antecedent A′, slightly different from A, will produce a consequent B′, slightly different from B. But how shall we recognize that the antecedents A and A′ are ‘slightly different’? If some one of the circumstances can be expressed by a number, and this number has in the two cases values very near together, the sense of the phrase ‘slightly different’ is relatively51 clear; the principle then signifies that the consequent is a continuous function of the antecedent. And as a practical rule, we reach this conclusion that we have the right to interpolate. This is in fact what scientists do every day, and without interpolation all science would be impossible.
Yet observe one thing. The law sought may be represented by a curve. Experiment has taught us certain points of this curve. In virtue of the principle we have just stated, we believe these points may be connected by a continuous graph. We trace this graph with the eye. New experiments will furnish us new points of the curve. If these points are outside of the graph traced in advance, we shall have to modify our curve, but not to abandon our principle. Through any points, however numerous they may be, a continuous curve may always be passed. Doubtless, if this curve is too capricious, we shall be shocked (and we shall even suspect errors of experiment), but the principle will not be directly put at fault.
Furthermore, among the circumstances of a phenomenon, there are some that we regard as negligible, and we shall consider A and A′ as slightly different if they differ only by these accessory circumstances. For instance, I have ascertained53 that hydrogen unites with oxygen under the influence of the electric spark, and I am certain that these two gases will unite anew, although the longitude54 of Jupiter may have changed considerably55 in the interval56. We assume, for instance, that the state of distant bodies can have no sensible influence on terrestrial phenomena, and that seems in fact requisite57, but there are cases where the choice of these practically indifferent circumstances admits of more arbitrariness or, if you choose, requires more tact58.
One more remark: The principle of induction would be inapplicable if there did not exist in nature a great quantity of bodies like one another, or almost alike, and if we could not infer, for instance, from one bit of phosphorus to another bit of phosphorus.
If we reflect on these considerations, the problem of determinism and of contingence will appear to us in a new light.
Suppose we were able to embrace the series of all phenomena of the universe in the whole sequence of time. We could envisage59 what might be called the sequences; I mean relations between antecedent and consequent. I do not wish to speak of constant relations or laws, I envisage separately (individually, so to speak) the different sequences realized.
We should then recognize that among these sequences there are no two altogether alike. But, if the principle of induction, as we have just stated it, is true, there will be those almost alike and that can be classed alongside one another. In other words, it is possible to make a classification of sequences.
It is to the possibility and the legitimacy60 of such a classification that determinism, in the end, reduces. This is all that the preceding analysis leaves of it. Perhaps under this modest form it will seem less appalling61 to the moralist.
It will doubtless be said that this is to come back by a detour62 to M. LeRoy’s conclusion which a moment ago we seemed to reject: we are determinists voluntarily. And in fact all classification supposes the active intervention of the classifier. I agree that this may be maintained, but it seems to me that this detour will not have been useless and will have contributed to enlighten us a little.
6. Objectivity of Science
I arrive at the question set by the title of this article: What is the objective value of science? And first what should we understand by objectivity?
What guarantees the objectivity of the world in which we live is that this world is common to us with other thinking beings. Through the communications that we have with other men, we receive from them ready-made reasonings; we know that these reasonings do not come from us and at the same time we recognize in them the work of reasonable beings like ourselves. And as these reasonings appear to fit the world of our sensations, we think we may infer that these reasonable beings have seen the same thing as we; thus it is we know we have not been dreaming.
Such, therefore, is the first condition of objectivity; what is objective must be common to many minds and consequently transmissible from one to the other, and as this transmission can only come about by that ‘discourse63’ which inspires so much distrust in M. LeRoy, we are even forced to conclude: no discourse, no objectivity.
The sensations of others will be for us a world eternally closed. We have no means of verifying that the sensation I call red is the same as that which my neighbor calls red.
Suppose that a cherry and a red poppy produce on me the sensation A and on him the sensation B and that, on the contrary, a leaf produces on me the sensation B and on him the sensation A. It is clear we shall never know anything about it; since I shall call red the sensation A and green the sensation B, while he will call the first green and the second red. In compensation, what we shall be able to ascertain52 is that, for him as for me, the cherry and the red poppy produce the same sensation, since he gives the same name to the sensations he feels and I do the same.
Sensations are therefore intransmissible, or rather all that is pure quality in them is intransmissible and forever impenetrable. But it is not the same with relations between these sensations.
From this point of view, all that is objective is devoid64 of all quality and is only pure relation. Certes, I shall not go so far as to say that objectivity is only pure quantity (this would be to particularize too far the nature of the relations in question), but we understand how some one could have been carried away into saying that the world is only a differential equation.
With due reserve regarding this paradoxical proposition, we must nevertheless admit that nothing is objective which is not transmissible, and consequently that the relations between the sensations can alone have an objective value.
Perhaps it will be said that the esthetic65 emotion, which is common to all mankind, is proof that the qualities of our sensations are also the same for all men and hence are objective. But if we think about this, we shall see that the proof is not complete; what is proved is that this emotion is aroused in John as in James by the sensations to which James and John give the same name or by the corresponding combinations of these sensations; either because this emotion is associated in John with the sensation A, which John calls red, while parallelly it is associated in James with the sensation B, which James calls red; or better because this emotion is aroused, not by the qualities themselves of the sensations, but by the harmonious66 combination of their relations of which we undergo the unconscious impression.
Such a sensation is beautiful, not because it possesses such a quality, but because it occupies such a place in the woof of our associations of ideas, so that it can not be excited without putting in motion the ‘receiver’ which is at the other end of the thread and which corresponds to the artistic67 emotion.
Whether we take the moral, the esthetic or the scientific point of view, it is always the same thing. Nothing is objective except what is identical for all; now we can only speak of such an identity if a comparison is possible, and can be translated into a ‘money of exchange’ capable of transmission from one mind to another. Nothing, therefore, will have objective value except what is transmissible by ‘discourse,’ that is, intelligible68.
But this is only one side of the question. An absolutely disordered aggregate69 could not have objective value since it would be unintelligible70, but no more can a well-ordered assemblage have it, if it does not correspond to sensations really experienced. It seems to me superfluous71 to recall this condition, and I should not have dreamed of it, if it had not lately been maintained that physics is not an experimental science. Although this opinion has no chance of being adopted either by physicists72 or by philosophers, it is well to be warned so as not to let oneself slip over the declivity73 which would lead thither74. Two conditions are therefore to be fulfilled, and if the first separates reality11 from the dream, the second distinguishes it from the romance.
11 I here use the word real as a synonym75 of objective; I thus conform to common usage; perhaps I am wrong, our dreams are real, but they are not objective.
Now what is science? I have explained in the preceding article, it is before all a classification, a manner of bringing together facts which appearances separate, though they were bound together by some natural and hidden kinship. Science, in other words, is a system of relations. Now we have just said, it is in the relations alone that objectivity must be sought; it would be vain to seek it in beings considered as isolated76 from one another.
To say that science can not have objective value since it teaches us only relations, this is to reason backward, since, precisely, it is relations alone which can be regarded as objective.
External objects, for instance, for which the word object was invented, are really objects and not fleeting77 and fugitive78 appearances, because they are not only groups of sensations, but groups cemented by a constant bond. It is this bond, and this bond alone, which is the object in itself, and this bond is a relation.
Therefore, when we ask what is the objective value of science, that does not mean: Does science teach us the true nature of things? but it means: Does it teach us the true relations of things?
To the first question, no one would hesitate to reply, no; but I think we may go farther; not only science can not teach us the nature of things; but nothing is capable of teaching it to us, and if any god knew it, he could not find words to express it. Not only can we not divine the response, but if it were given to us we could understand nothing of it; I ask myself even whether we really understand the question.
When, therefore, a scientific theory pretends to teach us what heat is, or what is electricity, or life, it is condemned79 beforehand; all it can give us is only a crude image. It is, therefore, provisional and crumbling80.
The first question being out of reason, the second remains. Can science teach us the true relations of things? What it joins together should that be put asunder81, what it puts asunder should that be joined together?
To understand the meaning of this new question, it is needful to refer to what was said above on the conditions of objectivity. Have these relations an objective value? That means: Are these relations the same for all? Will they still be the same for those who shall come after us?
It is clear that they are not the same for the scientist and the ignorant person. But that is unimportant, because if the ignorant person does not see them all at once, the scientist may succeed in making him see them by a series of experiments and reasonings. The thing essential is that there are points on which all those acquainted with the experiments made can reach accord.
The question is to know whether this accord will be durable82 and whether it will persist for our successors. It may be asked whether the unions that the science of to-day makes will be confirmed by the science of to-morrow. To affirm that it will be so we can not invoke83 any a priori reason; but this is a question of fact, and science has already lived long enough for us to be able to find out by asking its history whether the edifices84 it builds stand the test of time, or whether they are only ephemeral constructions.
Now what do we see? At the first blush, it seems to us that the theories last only a day and that ruins upon ruins accumulate. To-day the theories are born, to-morrow they are the fashion, the day after to-morrow they are classic, the fourth day they are superannuated85, and the fifth they are forgotten. But if we look more closely, we see that what thus succumb86 are the theories properly so called, those which pretend to teach us what things are. But there is in them something which usually survives. If one of them taught us a true relation, this relation is definitively87 acquired, and it will be found again under a new disguise in the other theories which will successively come to reign88 in place of the old.
Take only a single example: The theory of the undulations of the ether taught us that light is a motion; to-day fashion favors the electromagnetic theory which teaches us that light is a current. We do not consider whether we could reconcile them and say that light is a current, and that this current is a motion. As it is probable in any case that this motion would not be identical with that which the partisans of the old theory presume, we might think ourselves justified89 in saying that this old theory is dethroned. And yet something of it remains, since between the hypothetical currents which Maxwell supposes there are the same relations as between the hypothetical motions that Fresnel supposed. There is, therefore, something which remains over and this something is the essential. This it is which explains how we see the present physicists pass without any embarrassment90 from the language of Fresnel to that of Maxwell. Doubtless many connections that were believed well established have been abandoned, but the greatest number remain and it would seem must remain.
And for these, then, what is the measure of their objectivity? Well, it is precisely the same as for our belief in external objects. These latter are real in this, that the sensations they make us feel appear to us as united to each other by I know not what indestructible cement and not by the hazard of a day. In the same way science reveals to us between phenomena other bonds finer but not less solid; these are threads so slender that they long remained unperceived, but once noticed there remains no way of not seeing them; they are therefore not less real than those which give their reality to external objects; small matter that they are more recently known, since neither can perish before the other.
It may be said, for instance, that the ether is no less real than any external body; to say this body exists is to say there is between the color of this body, its taste, its smell, an intimate bond, solid and persistent91; to say the ether exists is to say there is a natural kinship between all the optical phenomena, and neither of the two propositions has less value than the other.
And the scientific syntheses have in a sense even more reality than those of the ordinary senses, since they embrace more terms and tend to absorb in them the partial syntheses.
It will be said that science is only a classification and that a classification can not be true, but convenient. But it is true that it is convenient, it is true that it is so not only for me, but for all men; it is true that it will remain convenient for our descendants; it is true finally that this can not be by chance.
In sum, the sole objective reality consists in the relations of things whence results the universal harmony. Doubtless these relations, this harmony, could not be conceived outside of a mind which conceives them. But they are nevertheless objective because they are, will become, or will remain, common to all thinking beings.
This will permit us to revert92 to the question of the rotation93 of the earth which will give us at the same time a chance to make clear what precedes by an example.
7. The Rotation of the Earth
“ . . . Therefore,” have I said in Science and Hypothesis, “this affirmation, the earth turns round, has no meaning . . . or rather these two propositions, the earth turns round, and, it is more convenient to suppose that the earth turns round, have one and the same meaning.”
These words have given rise to the strangest interpretations94. Some have thought they saw in them the rehabilitation95 of Ptolemy’s system, and perhaps the justification96 of Galileo’s condemnation97.
Those who had read attentively98 the whole volume could not, however, delude99 themselves. This truth, the earth turns round, was put on the same footing as Euclid’s postulate100, for example. Was that to reject it? But better; in the same language it may very well be said: These two propositions, the external world exists, or, it is more convenient to suppose that it exists, have one and the same meaning. So the hypothesis of the rotation of the earth would have the same degree of certitude as the very existence of external objects.
But after what we have just explained in the fourth part, we may go farther. A physical theory, we have said, is by so much the more true as it puts in evidence more true relations. In the light of this new principle, let us examine the question which occupies us.
No, there is no absolute space; these two contradictory propositions: ‘The earth turns round’ and ‘The earth does not turn round’ are, therefore, neither of them more true than the other. To affirm one while denying the other, in the kinematic sense, would be to admit the existence of absolute space.
But if the one reveals true relations that the other hides from us, we can nevertheless regard it as physically101 more true than the other, since it has a richer content. Now in this regard no doubt is possible.
Behold102 the apparent diurnal103 motion of the stars, and the diurnal motion of the other heavenly bodies, and besides, the flattening104 of the earth, the rotation of Foucault’s pendulum105, the gyration106 of cyclones107, the trade-winds, what not else? For the Ptolemaist all these phenomena have no bond between them; for the Copernican they are produced by the one same cause. In saying, the earth turns round, I affirm that all these phenomena have an intimate relation, and that is true, and that remains true, although there is not and can not be absolute space.
So much for the rotation of the earth upon itself; what shall we say of its revolution around the sun? Here again, we have three phenomena which for the Ptolemaist are absolutely independent and which for the Copernican are referred back to the same origin; they are the apparent displacements of the planets on the celestial108 sphere, the aberration109 of the fixed110 stars, the parallax of these same stars. Is it by chance that all the planets admit an inequality whose period is a year, and that this period is precisely equal to that of aberration, precisely equal besides to that of parallax? To adopt Ptolemy’s system is to answer, yes; to adopt that of Copernicus is to answer, no; this is to affirm that there is a bond between the three phenomena, and that also is true, although there is no absolute space.
In Ptolemy’s system, the motions of the heavenly bodies can not be explained by the action of central forces, celestial mechanics is impossible. The intimate relations that celestial mechanics reveals to us between all the celestial phenomena are true relations; to affirm the immobility of the earth would be to deny these relations, that would be to fool ourselves.
The truth for which Galileo suffered remains, therefore, the truth, although it has not altogether the same meaning as for the vulgar, and its true meaning is much more subtle, more profound and more rich.
8. Science for Its Own Sake
Not against M. LeRoy do I wish to defend science for its own sake; maybe this is what he condemns111, but this is what he cultivates, since he loves and seeks truth and could not live without it. But I have some thoughts to express.
We can not know all facts and it is necessary to choose those which are worthy112 of being known. According to Tolstoi, scientists make this choice at random113, instead of making it, which would be reasonable, with a view to practical applications. On the contrary, scientists think that certain facts are more interesting than others, because they complete an unfinished harmony, or because they make one foresee a great number of other facts. If they are wrong, if this hierarchy114 of facts that they implicitly115 postulate is only an idle illusion, there could be no science for its own sake, and consequently there could be no science. As for me, I believe they are right, and, for example, I have shown above what is the high value of astronomical116 facts, not because they are capable of practical applications, but because they are the most instructive of all.
It is only through science and art that civilization is of value. Some have wondered at the formula: science for its own sake; and yet it is as good as life for its own sake, if life is only misery117; and even as happiness for its own sake, if we do not believe that all pleasures are of the same quality, if we do not wish to admit that the goal of civilization is to furnish alcohol to people who love to drink.
Every act should have an aim. We must suffer, we must work, we must pay for our place at the game, but this is for seeing’s sake; or at the very least that others may one day see.
All that is not thought is pure nothingness; since we can think only thoughts and all the words we use to speak of things can express only thoughts, to say there is something other than thought, is therefore an affirmation which can have no meaning.
And yet — strange contradiction for those who believe in time — geologic history shows us that life is only a short episode between two eternities of death, and that, even in this episode, conscious thought has lasted and will last only a moment. Thought is only a gleam in the midst of a long night.
But it is this gleam which is everything.
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| n.速度，速率 | |
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contingent
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| adj.视条件而定的；n.一组，代表团，分遣队 | |
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qualified
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| adj.合格的，有资格的，胜任的，有限制的 | |
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remains
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| n.剩余物，残留物；遗体，遗迹 | |
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intervention
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| n.介入，干涉，干预 | |
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kinetic
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| adj.运动的；动力学的 | |
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gaseous
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| adj.气体的，气态的 | |
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molecules
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| 分子( molecule的名词复数 ) | |
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molecule
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| n.分子，克分子 | |
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19
velocities
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| n.速度( velocity的名词复数 )；高速，快速 | |
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vessel
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| n.船舶；容器，器皿；管，导管，血管 | |
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deviations
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| 背离，偏离( deviation的名词复数 )； 离经叛道的行为 | |
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22
compensate
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| vt.补偿，赔偿；酬报 vi.弥补；补偿；抵消 | |
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23
phenomena
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| n.现象 | |
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24
incessantly
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| ad.不停地 | |
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25
displacements
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| n.取代( displacement的名词复数 )；替代；移位；免职 | |
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26
conformity
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| n.一致，遵从，顺从 | |
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deviate
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| v.(from)背离，偏离 | |
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sufficiently
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| adv.足够地，充分地 | |
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partisans
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| 游击队员( partisan的名词复数 )； 党人； 党羽； 帮伙 | |
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adversaries
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| n.对手，敌手( adversary的名词复数 ) | |
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31
rigid
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| adj.严格的，死板的；刚硬的，僵硬的 | |
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perfectly
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| adv.完美地，无可非议地，彻底地 | |
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evolutionary
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| adj.进化的；演化的，演变的；[生]进化论的 | |
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epoch
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| n.(新)时代；历元 | |
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35
deduction
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| n.减除，扣除，减除额；推论，推理，演绎 | |
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astronomer
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| n.天文学家 | |
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precisely
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| adv.恰好，正好，精确地，细致地 | |
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38
geologic
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| adj.地质的 | |
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speculations
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| n.投机买卖( speculation的名词复数 )；思考；投机活动；推断 | |
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contradictory
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| adj.反驳的，反对的，抗辩的；n.正反对，矛盾对立 | |
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constrained
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| adj.束缚的,节制的 | |
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analyzed
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| v.分析( analyze的过去式和过去分词 )；分解；解释；对…进行心理分析 | |
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43
transformation
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| n.变化；改造；转变 | |
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44
determined
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| adj.坚定的；有决心的 | |
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45
eminently
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| adv.突出地；显著地；不寻常地 | |
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46
induction
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| n.感应，感应现象 | |
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47
justify
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| vt.证明…正当(或有理)，为…辩护 | |
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48
recur
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| vi.复发，重现，再发生 | |
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recurs
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| 再发生，复发( recur的第三人称单数 ) | |
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recurred
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| 再发生，复发( recur的过去式和过去分词 )； 治愈 | |
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relatively
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| adv.比较...地，相对地 | |
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ascertain
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| vt.发现，确定，查明，弄清 | |
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53
ascertained
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| v.弄清，确定，查明( ascertain的过去式和过去分词 ) | |
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longitude
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| n.经线，经度 | |
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considerably
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| adv.极大地；相当大地；在很大程度上 | |
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interval
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| n.间隔，间距；幕间休息，中场休息 | |
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requisite
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| adj.需要的，必不可少的；n.必需品 | |
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58
tact
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| n.机敏，圆滑，得体 | |
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envisage
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| v.想象，设想，展望，正视 | |
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legitimacy
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| n.合法，正当 | |
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61
appalling
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| adj.骇人听闻的，令人震惊的，可怕的 | |
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detour
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| n.绕行的路，迂回路；v.迂回，绕道 | |
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discourse
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| n.论文，演说；谈话；话语；vi.讲述，著述 | |
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devoid
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| adj.全无的，缺乏的 | |
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esthetic
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| adj.美学的，审美的；悦目的，雅致的 | |
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harmonious
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| adj.和睦的，调和的，和谐的，协调的 | |
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artistic
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| adj.艺术(家)的，美术(家)的；善于艺术创作的 | |
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intelligible
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| adj.可理解的，明白易懂的，清楚的 | |
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aggregate
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| adj.总计的，集合的；n.总数；v.合计；集合 | |
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unintelligible
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| adj.无法了解的，难解的，莫明其妙的 | |
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71
superfluous
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| adj.过多的，过剩的，多余的 | |
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72
physicists
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| 物理学家( physicist的名词复数 ) | |
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73
declivity
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| n.下坡，倾斜面 | |
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74
thither
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| adv.向那里；adj.在那边的，对岸的 | |
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75
synonym
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| n.同义词，换喻词 | |
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isolated
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| adj.与世隔绝的 | |
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77
fleeting
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| adj.短暂的，飞逝的 | |
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78
fugitive
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| adj.逃亡的，易逝的；n.逃犯，逃亡者 | |
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condemned
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| adj. 被责难的, 被宣告有罪的 动词condemn的过去式和过去分词 | |
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80
crumbling
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| adj.摇摇欲坠的 | |
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81
asunder
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| adj.分离的，化为碎片 | |
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82
durable
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| adj.持久的，耐久的 | |
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83
invoke
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| v.求助于(神、法律)；恳求，乞求 | |
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84
edifices
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| n.大建筑物( edifice的名词复数 ) | |
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85
superannuated
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| adj.老朽的，退休的；v.因落后于时代而废除，勒令退学 | |
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86
succumb
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| v.屈服，屈从；死 | |
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87
definitively
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| adv.决定性地，最后地 | |
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88
reign
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| n.统治时期，统治，支配，盛行；v.占优势 | |
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justified
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| a.正当的，有理的 | |
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90
embarrassment
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| n.尴尬；使人为难的人(事物)；障碍；窘迫 | |
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persistent
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| adj.坚持不懈的，执意的；持续的 | |
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92
revert
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| v.恢复，复归，回到 | |
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93
rotation
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| n.旋转；循环，轮流 | |
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94
interpretations
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| n.解释( interpretation的名词复数 )；表演；演绎；理解 | |
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95
rehabilitation
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| n.康复，悔过自新，修复，复兴，复职，复位 | |
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96
justification
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| n.正当的理由；辩解的理由 | |
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97
condemnation
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| n.谴责; 定罪 | |
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98
attentively
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| adv.聚精会神地；周到地；谛；凝神 | |
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99
delude
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| vt.欺骗；哄骗 | |
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100
postulate
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| n.假定，基本条件；vt.要求，假定 | |
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101
physically
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| adj.物质上，体格上，身体上，按自然规律 | |
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102
behold
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| v.看，注视，看到 | |
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103
diurnal
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| adj.白天的，每日的 | |
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104
flattening
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| n. 修平 动词flatten的现在分词 | |
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105
pendulum
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| n.摆，钟摆 | |
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106
gyration
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| n.旋转 | |
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107
cyclones
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| n.气旋( cyclone的名词复数 )；旋风；飓风；暴风 | |
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108
celestial
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| adj.天体的；天上的 | |
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109
aberration
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| n.离开正路，脱离常规，色差 | |
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fixed
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| adj.固定的，不变的，准备好的；(计算机)固定的 | |
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111
condemns
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| v.（通常因道义上的原因而）谴责( condemn的第三人称单数 )；宣判；宣布…不能使用；迫使…陷于不幸的境地 | |
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112
worthy
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| adj.(of)值得的，配得上的；有价值的 | |
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113
random
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| adj.随机的；任意的；n.偶然的(或随便的)行动 | |
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114
hierarchy
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| n.等级制度；统治集团，领导层 | |
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115
implicitly
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| adv. 含蓄地, 暗中地, 毫不保留地 | |
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116
astronomical
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| adj.天文学的，（数字）极大的 | |
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117
misery
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| n.痛苦，苦恼，苦难；悲惨的境遇，贫苦 | |
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