Combining Philosophers
Ideas for Lynch,MP/Glasgow,JM, Martin Luther and Ren Descartes
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3 ideas
10. Modality / C. Sources of Modality / 4. Necessity from Concepts
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3+4=7 is necessary because we cannot conceive of seven without including three and four [Descartes]
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10. Modality / D. Knowledge of Modality / 1. A Priori Necessary
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We know by thought that what is done cannot be undone [Descartes]
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10. Modality / D. Knowledge of Modality / 4. Conceivable as Possible / b. Conceivable but impossible
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Pythagoras' Theorem doesn't cease to be part of the essence of triangles just because we doubt it [Arnauld on Descartes]
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