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4033 | Two pure spheres in non-absolute space are identical but indiscernible [Campbell,K] |
Full Idea: The Identity of Indiscernibles is not a necessary truth. It fails in possible worlds where there are two identical spheres in a non-absolute space, or worlds without beginning or end where events are exactly cyclically repeated. | |
From: Keith Campbell (The Metaphysic of Abstract Particulars [1981], §5) | |
A reaction: The principle was always very suspect, and these seem nice counterexamples. As so often, epistemology and ontology had become muddled. |