CHAPTER III THE NATURE OF MATTER IN the preceding chapter we agreed, though without being able to find demonstrative reasons, that it is rational to believe that our sense-data -- for example, those which we regard as associated with my table -- are really signs of the existence of something independent of us and our perceptions. That is to say, over and above the sensations of color, hardness, noise, and so on, which make up the appearance of the table to me, I assume that there is something else, of which these things are appearances. The color ceases to exist if I shut my eyes, the sensation of hardness ceases to exist if I remove my arm from contact with the table, the sound ceases to exist if I cease to rap the table with my knuckles. But I do not believe that when all these things cease the table ceases. On the contrary, I believe that it is because the table exists continuously that all these sense-data will reappear when I open...
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.)