display all the ideas for this combination of texts
3 ideas
23496 | Two colours in the same place is ruled out by the logical structure of colour [Wittgenstein] |
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] |