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Ideas for 'Scientific Explanation', 'Human Knowledge: its scope and limits' and 'Sense Data and the Percept Theory'

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5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / c. not
Is it possible to state every possible truth about the whole course of nature without using 'not'? [Russell]
     Full Idea: Imagine a person who knew everything that can be stated without using the word 'not' or some equivalent; would such a person know the whole course of nature, or would he not?
     From: Bertrand Russell (Human Knowledge: its scope and limits [1948], 9)
     A reaction: Nowadays we might express Russell's thought as 'Does God need the word 'not'?'. Russell's thesis is that such words concern psychology, and not physics. God would need 'not' to describe how human minds work.