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12922 | A thing 'expresses' another if they have a constant and fixed relationship [Leibniz] |
Full Idea: One thing 'expresses' another (in my terminology) when there exists a constant and fixed relationship between what can be said of one and of the other. This is the way that a perspectival projection expresses its ground-plan. | |
From: Gottfried Leibniz (Letters to Antoine Arnauld [1686], 1687.10.09) | |
A reaction: Arnauld was puzzled by what Leibniz might mean by 'express', and it occurs to me that Leibniz was fishing for the modern concept of 'supervenience'. It also sounds a bit like the idea of 'covariance' between mind and world. Maybe he means 'function'. |