Combining Texts

Ideas for 'fragments/reports', 'Medical Conceptions of Health pre-Renaissance' and 'Travels in Four Dimensions'

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2 ideas

7. Existence / A. Nature of Existence / 3. Being / d. Non-being

22919	A thing which makes no difference seems unlikely to exist [Le Poidevin]
	Full Idea: It is a powerful argument for something's non-existence that it would make absolutely no difference.
	From: Robin Le Poidevin (Travels in Four Dimensions [2003], 02 'Everything')
	A reaction: Powerful, but not conclusive. Neutrinos don't seem to do much, so it isn't far from there to get a particle which does nothing.

7. Existence / A. Nature of Existence / 6. Criterion for Existence

5992	Chrysippus says action is the criterion for existence, which must be physical [Chrysippus, by Tieleman]
	Full Idea: Chrysippus regarded power to act and be acted upon as the criterion for existence or being - a test satisfied by bodies alone.
	From: report of Chrysippus (fragments/reports [c.240 BCE]) by Teun L. Tieleman - Chrysippus
	A reaction: This defines existence in terms of causation. Is he ruling out a priori a particle (say) which exists, but never interacts with anything? If so, he is inclining towards anti-realism.