Questionnaire-2024/propositional_logic/practical_questions/1_5_declarative_self.tex

\item \self Model the following sentences as detailed as possible in propositional logic.
\begin{enumerate}
    \item If a formula is unsat, it cannot be valid.
    \item It can be proven that there exists an infinite number of primes.
    \item A sentence is called declarative, if and only if it can be assigned a truth value.
\end{enumerate}