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Identity Through Change And Substitutivity Salva Veritate, Ray Elugardo, Robert J. Stainton

Robert J. Stainton

This paper has three modest aims: to present a puzzle, to show why some obvious solutions aren’t really “easy outs”, and to introduce our own solution. The puzzle is this. When it was small and had waterlogged streets, Toronto carried the moniker ‘Muddy York’. Later, the streets were drained, it grew, and Muddy York officially changed its name to ‘Toronto’. Given this, each premise in the following argument seems true. Yet the conclusion is a contraction. P1: Muddy York = Toronto P2: Muddy York evolved into Toronto P3: The context “__ evolved into Toronto” is transparent, i.e., it allows substitution …