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Ideas for 'fragments/reports', 'Natural Science (lost)' and 'Structure and Nature'
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2 ideas
7. Existence / A. Nature of Existence / 6. Criterion for Existence
527
Everything exists which anyone perceives
[Metrodorus of Chios]
5992
Chrysippus says action is the criterion for existence, which must be physical
[Chrysippus, by Tieleman]