\item \self Tick all statements that are true.
\begin{itemize}
	\item[$\square$] A \textit{clause} is a disjunction of literals.
	\item[$\square$] A \textit{clause} is a conjunction of literals.
	\item[$\square$] A \textit{cube} is disjunction of literals.
	\item[$\square$] A \textit{cube} is a conjunction of literals.
\end{itemize}