Exercise logic.propositional.dnf
Description
Proposition to DNF
Derivation
Final term is not finished
~~(p || q) /\ ((r <-> p) || (r <-> p))
⇒ logic.propositional.defequiv~~(p || q) /\ ((r /\ p) || (~r /\ ~p) || (r <-> p))
⇒ logic.propositional.defequiv~~(p || q) /\ ((r /\ p) || (~r /\ ~p) || (r /\ p) || (~r /\ ~p))
⇒ logic.propositional.idempor~~(p || q) /\ ((r /\ p) || (~r /\ ~p))