Press the right key for the next slide (or swipe left)

also ...

Press the left key to go backwards (or swipe right)

Press n to toggle whether notes are shown (no equivalent if you don't have a keyboard)

Press m or double tap to see a menu of slides

 

Revison: Proofs (propositional)

\begin{enumerate}
\item
\begin{equation*}
\begin{fitch}
\fh \lnot P \land R \\
\fa \lnot P \\
\end{fitch}
\end{equation*}
\item
\begin{equation*}
\begin{fitch}
\fh \lnot P \lor R \\
\fa P \to R \\
\end{fitch}
\end{equation*}
\end{enumerate}