Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

~(q -> r) || q || r || ~(~(~(q -> r) || q) /\ ~r)

⇒ logic.propositional.demorganor

~(q -> r) || q || r || ~(~~(q -> r) /\ ~q /\ ~r)

⇒ logic.propositional.notnot

~(q -> r) || q || r || ~((q -> r) /\ ~q /\ ~r)

⇒ logic.propositional.defimpl

~(q -> r) || q || r || ~((~q || r) /\ ~q /\ ~r)

⇒ logic.propositional.absorpand

~(q -> r) || q || r || ~(~q /\ ~r)