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Exercícios de Dedução Natural (view source)
Revision as of 02:36, 19 September 2020
, 02:36, 19 September 2020→\vdash (\alpha \to \beta) \lor (\beta \to \alpha), via terceiro excluído
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==== <math>\vdash (\alpha \to \beta) \lor (\beta \to \alpha)</math>, via terceiro excluído ====
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===Derivabilidade de regras===
