Combining Texts

Ideas for 'On the Question of Absolute Undecidability', 'Tractatus Logico-Philosophicus' and 'Language,Truth and Logic'

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10 ideas

12. Knowledge Sources / A. A Priori Knowledge / 2. Self-Evidence

16907

If the truth doesn't follow from self-evidence, then self-evidence cannot justify a truth [Wittgenstein]

12. Knowledge Sources / A. A Priori Knowledge / 4. A Priori as Necessities

5198	We could verify 'a thing can't be in two places at once' by destroying one of the things [Ierubino on Ayer]

12. Knowledge Sources / A. A Priori Knowledge / 5. A Priori Synthetic

23479

The Tractatus aims to reveal the necessities, without appealing to synthetic a priori truths [Wittgenstein, by Morris,M]

23501

There is no a priori order of things [Wittgenstein]

2619	Whether geometry can be applied to reality is an empirical question outside of geometry [Ayer]

12. Knowledge Sources / A. A Priori Knowledge / 7. A Priori from Convention

5197	By changing definitions we could make 'a thing can't be in two places at once' a contradiction [Ayer]

12. Knowledge Sources / A. A Priori Knowledge / 8. A Priori as Analytic

7088	Logic and maths can't say anything about the world, since, as tautologies, they are consistent with all realities [Wittgenstein, by Grayling]

5204	To say that a proposition is true a priori is to say that it is a tautology [Ayer]

12. Knowledge Sources / A. A Priori Knowledge / 10. A Priori as Subjective

16909

Logic is a priori because we cannot think illogically [Wittgenstein]

12. Knowledge Sources / A. A Priori Knowledge / 11. Denying the A Priori

23485

No pictures are true a priori [Wittgenstein]