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\item \self Consider the propositional formula $\phi = (\lnot(\lnot a
\land b) \land \lnot c)$. Fill out the truth table for $\phi$
and its subformulas. Compute a CNF as well as a DNF for $\phi$ from
the truth table.
\begin{tabular}{|c|c|c||c|c|c|c||c|}
\hline
$a$&$b$&$c$&$\lnot a$&$\lnot a \land b$&$\lnot(\lnot a \land b)$&$\lnot c$&$\phi = (\lnot(\lnot a \land b) \land \lnot c)$\\
\hline
\hline
\textbf{F} &\textbf{F} &\textbf{F} & & & & &\\
\hline
\textbf{F} &\textbf{F} &\textbf{T} & & & & &\\
\hline
\textbf{F} &\textbf{T} &\textbf{F} & & & & &\\
\hline
\textbf{F} &\textbf{T} &\textbf{T} & & & & &\\
\hline
\textbf{T} &\textbf{F} &\textbf{F} & & & & &\\
\hline
\textbf{T} &\textbf{F} &\textbf{T} & & & & &\\
\hline
\textbf{T} &\textbf{T} &\textbf{F} & & & & &\\
\hline
\textbf{T} &\textbf{T} &\textbf{T} & & & & &\\
\hline
\end{tabular}