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True or False.
For any set of sentences, T, if T semantically entails (double turnstile symbol) p v q, then either T semantically entails p or T semantically entails q.

Shaun
  • 44,997

1 Answers1

4

False.

$\{(p\vee q)\}\models(p\vee q)$ but $\{(p\vee q)\}\not\models p$ and $\{(p\vee q)\}\not\models q$ .

79037662
  • 1,379