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19427 | True ideas represent what is possible; false ideas represent contradictions [Leibniz] |
Full Idea: An idea is true if what it represents is possible; false if the representation contains a contradiction. | |
From: Gottfried Leibniz (Reflections on Knowledge, Truth and Ideas [1684], p.287) | |
A reaction: Odd in the analytic tradition to talk of a single idea or concept (rather than a proposition or utterance) as being 'true'. But there is clearly a notion of valid or legitimate or useful concepts here. Hilbert said true just meant non-contradictory. |