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Ideas for 'fragments/reports', 'Manuscript remains' and 'Eudemian Ethics'

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10. Modality / C. Sources of Modality / 6. Necessity from Essence

22505	The two right angles of a triangle necessitate that a quadrilateral has four [Aristotle]
	Full Idea: If it is necessary that, if a triangle contains two right angles, that a quadrilateral has four, it is clear that the cause of this is that a triangle has two.
	From: Aristotle (Eudemian Ethics [c.333 BCE], 1222b31)
	A reaction: We would not normally use the word 'cause' for this, but 'necessitates' seems to fit, and I like the word 'determines' (because it can be both physical and abstract). An example of what I think of as an Aristotelian necessity maker.