Combining Texts

Ideas for 'The Advancement of Learning', 'Philosophical Logic: Intro to Advanced Topics' and 'Tractatus Logico-Philosophicus'

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4 ideas

5. Theory of Logic / D. Assumptions for Logic / 3. Contradiction

23496

Two colours in the same place is ruled out by the logical structure of colour [Wittgenstein]

5. Theory of Logic / D. Assumptions for Logic / 4. Identity in Logic

13429

The identity sign is not essential in logical notation, if every sign has a different meaning [Wittgenstein, by Ramsey]

18154

The sign of identity is not allowed in 'Tractatus' [Wittgenstein, by Bostock]

13851

Unlike most other signs, = cannot be eliminated [Engelbretsen/Sayward]