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Heraclitus traditionally said 'You can't step into the same river twice'

Who, in response, said 'You can't step in the same river once'?

I would like to attribute it to Parmenides or one the Eleatics but is it someone more recent?

  • Not Parmenides for sure.... – Mauro ALLEGRANZA Mar 23 at 17:11
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    Wikipedia attributes this to one Cratylus, – Mark Andrews Mar 23 at 17:42
  • And so does Oxford Reference:"you cannot step into the same river once: the river is changing and gone even as a single event of stepping occurs." – Conifold Mar 23 at 19:41
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It is attributed by Aristotle in the Metaphysics to Cratylus, a follower of Heraclitus. Reference: Aristotle, Metaphysics, 4.5 1010a10-15.

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