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  1. \item \lect Use the DPLL algorithm with \textit{Boolean Constrain Propagation} (\emph{without} PL and clause learning) to determine whether or not the set of clauses given is satisfiable. Decide variables in alphabetical order starting with the \textit{positive} phase. If the set of clauses resulted in \texttt{SAT}, give a satisfying model.
  2. \begin{dpllCNFInput}
  3. \item $(\lnot a \lor b)$
  4. \item $(\lnot b \lor c)$
  5. \item $(\lnot c \lor d)$
  6. \item $(\lnot d \lor e)$
  7. \item $(\lnot e \lor \lnot a)$
  8. \end{dpllCNFInput}