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16768 | Two things are different if something is true of one and not of the other [Duns Scotus] |
Full Idea: If this is, and that is not, then they are not the same entity in being. | |
From: John Duns Scotus (Ordinatio [1302], IV.11.3), quoted by Robert Pasnau - Metaphysical Themes 1274-1671 25.3 | |
A reaction: This is the contrapositive of the indiscernibility of identicals, expressed in terms of what is true about a thing, rather than what properties pertain to it. |