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Questionnaire-2024/propositional_logic/0011.tex

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  1. \item \lect Consider the propositional formula $\varphi = \neg (\neg p
  2. \vee q) \rightarrow (p \wedge \neg r)$.
  4. Find a propositional formula $\psi$ that is syntactically
  5. different from $\varphi$, but semantically equivalent to
  6. $\varphi$. Show the semantic equivalence of $\varphi$ and
  7. $\psi$ using truth tables.