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11001 | Equating necessity with truth in every possible world is the S5 conception of necessity [Read] |
Full Idea: The equation of 'necessity' with 'true in every possible world' is known as the S5 conception, corresponding to the strongest of C.I.Lewis's five modal systems. | |
From: Stephen Read (Thinking About Logic [1995], Ch.4) | |
A reaction: Are the worlds naturally, or metaphysically, or logically possible? |