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Ideas for 'Through the Looking Glass', 'Relativism' and 'First-order Logic, 2nd-order, Completeness'

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5. Theory of Logic / E. Structures of Logic / 1. Logical Form

10754

In proof-theory, logical form is shown by the logical constants [Rossberg]

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives

4704	Wittgenstein reduced Russell's five primitive logical symbols to a mere one [O'Grady]