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16488 | It is hard to explain how a sentence like 'it is not raining' can be found true by observation [Russell] |
Full Idea: If 'it is not raining' means 'the sentence "it is raining" is false', that makes it almost impossible to understand how a sentence containing the word 'not' can be found true by observation. | |
From: Bertrand Russell (Human Knowledge: its scope and limits [1948], 9) | |
A reaction: Russell goes on to explore the general difficulty of deciding negative truths by observation. The same problem arises for truthmaker theory. Obviously I can observe that it isn't raining, but it seems parasitic on observing when it is raining. |