Combining Philosophers

Ideas for Xenophon, Ren Descartes and Epicurus

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4 ideas

10. Modality / C. Sources of Modality / 4. Necessity from Concepts

24030

3+4=7 is necessary because we cannot conceive of seven without including three and four [Descartes]

10. Modality / D. Knowledge of Modality / 1. A Priori Necessary

2301	We know by thought that what is done cannot be undone [Descartes]

10. Modality / D. Knowledge of Modality / 4. Conceivable as Possible / b. Conceivable but impossible

3642	Pythagoras' Theorem doesn't cease to be part of the essence of triangles just because we doubt it [Arnauld on Descartes]

10. Modality / D. Knowledge of Modality / 4. Conceivable as Possible / c. Possible but inconceivable

14039

Above and below us will never appear to be the same, because it is inconceivable [Epicurus]