\item \self Tick all properties that apply to a \textit{reduced} and \textit{ordered} BDD (ROBDD).
\begin{itemize}
  \item[$\square$] Checks for entailment can be done in constant time.
  \item[$\square$] Some formulas that can be expressed by truth tables cannot be expressed by BDDs.
  \item[$\square$] Equivalence checks can be performed in constant time (assuming that the BDDs for the formula to check are already available).
\end{itemize}