Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.notnot

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

⇒ logic.propositional.defimpl

(~r || q) /\ ~~~~(~~(q || p) /\ ~q)