Validades Existenciais e Enigmas Relacionados
Logic does not have purely existential theorems: the only existential sentences that are valid are those with valid universal analogues. Here, we show indeed this is so, when properly interpreted: every existential validity has a simple universal analogue, which is also valid. We also characterize e...
| Main Authors: | , , |
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| Format: | Article |
| Language: | Portuguese |
| Published: |
Universidade Federal do Paraná
2009-10-01
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| Series: | DoisPontos |
| Subjects: | |
| Online Access: | http://ojs.c3sl.ufpr.br/ojs2/index.php/doispontos/article/view/17336 |