Combining Texts
Ideas for
'Function and Concept', 'Confessions of a Philosopher' and 'Tractatus Logico-Philosophicus'
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6 ideas
5. Theory of Logic / E. Structures of Logic / 1. Logical Form
18268
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Apparent logical form may not be real logical form [Wittgenstein]
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5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives
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My fundamental idea is that the 'logical constants' do not represent [Wittgenstein]
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5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / c. not
23493
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'Not' isn't an object, because not-not-p would then differ from p [Wittgenstein]
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5. Theory of Logic / E. Structures of Logic / 4. Variables in Logic
7784
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'Object' is a pseudo-concept, properly indicated in logic by the variable x [Wittgenstein]
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5. Theory of Logic / E. Structures of Logic / 5. Functions in Logic
8490
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First-level functions have objects as arguments; second-level functions take functions as arguments [Frege]
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5. Theory of Logic / E. Structures of Logic / 6. Relations in Logic
8492
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Relations are functions with two arguments [Frege]
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