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\begin{frame}
\frametitle{ProofWeb}

\begin{goal}{}
ProofWeb allows to practise natural deduction online:
\begin{itemize}
\medskip
\item based on the proof assistant Coq
\medskip
\item the derivations are automatically checked for correctness
\medskip
\end{itemize}
\end{goal}

\end{frame}