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 predicted, that it is governed by the laws.
A very small cause which escapes our notice determines a considerable effect that we cannot fail to see, and then we say that the effect is due to chance.
To doubt everything, or, to believe everything, are two equally convenient solutions; both dispense with the necessity of reflection.
It has adopted the geometry most advantageous to the species or, in other words, the most convenient.
Thus, they are free to replace some objects by others so long as the relations remain unchanged.
No more than these machines need the mathematician know what he does.