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Just as houses are made of stones, so is science made of facts.
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Henri Poincare
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Science is facts.
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Henri Poincare
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How is an error possible in mathematics?
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Henri Poincare
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Point set topology is a disease from which the human race will soon recover.
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Henri Poincare
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No more than these machines need the mathematician know what he does.
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Henri Poincare
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A scientist worthy of his name, about all a mathematician, experiences in his work the same impression as an artist; his pleasure is as great and of the same...
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Henri Poincare
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Absolute space, that is to say, the mark to which it would be necessary to refer the earth to know whether it really moves, has no objective existence.
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Henri Poincare
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One would have to have completely forgotten the history of science so as to not remember that the desire to know nature has had the most constant and the...
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Henri Poincare
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Facts do not speak.
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Henri Poincare
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If one looks at the different problems of the integral calculus which arise naturally when one wishes to go deep into the different parts of physics, it is...
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Henri Poincare
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Invention consists in avoiding the constructing of useless contraptions and in constructing the useful combinations which are in infinite minority.
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Henri Poincare
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To invent is to discern, to choose.
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Henri Poincare
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If that enabled us to predict the succeeding situation with the same approximation, that is all we require, and we should say that the phenomenon had been...
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Henri Poincare
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Mathematics is the art of giving the same name to different things.
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Henri Poincare
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In the old days when people invented a new function they had something useful in mind.
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Henri Poincare
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It has adopted the geometry most advantageous to the species or, in other words, the most convenient.
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Henri Poincare
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If nature were not beautiful, it would not be worth knowing, and if nature were not worth knowing, life would not be worth living.
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Henri Poincare
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Need we add that mathematicians themselves are not infallible?
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Henri Poincare
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It is the harmony of the diverse parts, their symmetry, their happy balance; in a word it is all that introduces order, all that gives unity, that permits us...
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Henri Poincare
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It is through science that we prove, but through intuition that we discover.
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Henri Poincare
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The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.
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Henri Poincare
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Thought is only a flash between two long nights, but this flash is everything.
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Henri Poincare
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Mathematicians do not study objects, but relations between objects.
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Henri Poincare
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Mathematicians are born, not made.
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Henri Poincare
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Ideas rose in clouds; I felt them collide until pairs interlocked, so to speak, making a stable combination.
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Henri Poincare
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To doubt everything, or, to believe everything, are two equally convenient solutions; both dispense with the necessity of reflection.
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Henri Poincare
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Science is built up of facts, as a house is with stones. But a collection of facts is no more a science than a heap of stones is a house.
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Henri Poincare
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If we knew exactly the laws of nature and the situation of the universe at the initial moment, we could predict exactly the situation of the same universe at...
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Henri Poincare
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It is far better to foresee even without certainty than not to foresee at all.
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Henri Poincare
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Geometry is not true, it is advantageous.
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Henri Poincare
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