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9. Objects / E. Objects over Time / 8. Continuity of Rivers

[is a river the same as the water in the river?]

8 ideas
You can bathe in the same river twice, but not in the same river stage [Quine on Heraclitus]
It is not possible to step twice into the same river [Heraclitus]
Cratylus said you couldn't even step into the same river once [Aristotle on Cratylus]
A thing is (less properly) the same over time if each part is succeeded by another [Buridan]
It is the same river if it has the same source, no matter what flows in it [Hobbes]
If rivers retain identity when the water slowly changes, this must be because of human expectations [PG on Hume]
Humeans cannot step in the same river twice, because they cannot strictly form the concept of 'river' [Harré/Madden]
One can step into the same river twice, but not into the same water [Benardete,JA]