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I remember the philosopher Bertrand Russell was asked why he spent his time protesting against nuclear war and getting arrested on demonstrations. Why didn’t he continue to work on the serious philosophical and logical problems which have major intellectual significance? And his answer was pretty good. He said: “Look, if I and others like me only work on those problems, there won’t be anybody around to appreciate it or be interested.
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Among the objections to the reality of objects of sense, there is one which is derived from the apparent difference between matter as it appears in physics and things as they appear in sensation. Men of science, for the most part, are willing to condemn immediate data as "merely subjective," while yet maintaining the truth of the physics inferred from those data. But such an attitude, though it may be *capable* of justification, obviously stands in need of it; and the only justification possible
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