\section{Rule number 5: forking}
\begin{frame}{By popular demand}
    Even though there is no RFC for how to fork a thread whose topic pivoted, we usually do so by changing the subject and appending the old subject in parentheses.

    \begin{center}
        \texttt{\$new\_subject (was: \$old\_subject)}
    \end{center}
\end{frame}
