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489 | Each thing must be in some way unique [Diogenes of Apollonia] |
Full Idea: No one thing among things subject to change can possibly be exactly like any other thing, without becoming the same thing. | |
From: Diogenes (Apoll) (fragments/reports [c.440 BCE], B05), quoted by Simplicius - On Aristotle's 'Physics' 153.8 | |
A reaction: This is said to be the first ever formulation of the principle of identity of indiscernible. |