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6163 | If bivalence is rejected, then excluded middle must also be rejected [Rowlands] |
Full Idea: If you reject the principle of bivalence (that a proposition is either determinately true or false), then statements are also not subject to the Law of Excluded Middle (P or not-P). | |
From: Mark Rowlands (Externalism [2003], Ch.3) | |
A reaction: I think Rowlands is wrong about this. Excluded Middle could be purely syntacti, or its semantics could be 'True or Not-True'. Only bivalent excluded middle introduces 'True or False'. Compare Idea 4752. |