CHAPTER VII ON OUR KNOWLEDGE OF GENERAL PRINCIPLES WE saw in the preceding chapter that the principle of Induction, while necessary to the validity of all arguments based on experience, is itself not capable of being proved by experience, and yet is unhesitatingly believed by every one, at least in all its concrete applications. In these characteristics the principle of induction does not stand alone. There are a number of other principles which cannot be proved or disproved by experience, but are used in arguments which start from what is experienced. Some of these principles have even greater evidence than the principle of induction, and the knowledge of them has the same degree of certainty as the knowledge of the existence of sense-data. They constitute the means of drawing inferences from what is given in sensation; and if what we infer is to be true, it is just as necessary that our principles of inference should be true as it is t...
The Century Magazine, July 1929, Vol. 118, No. 3, Pgs. 311-315 The Twilight Of Science Is The Universe Running Down Bertrand Russell It is a curious fact that just when the man in the street has begun to believe thoroughly in science, the man in the laboratory has begun to lose his faith. When I was young, no physicist entertained the slightest doubt that the laws of physics give us real information about the motions of bodies, and that the physical world does really consist of the sort of entities that appear in the physicist's equations. The philosophers, it is true, throw doubt upon this view, and have done so ever since the time of Berkeley; but since their criticism never attached itself to any point in the detailed procedure of scienc... (From : Anarchy Archives.)