Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

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

⇒ logic.propositional.notnot

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

⇒ logic.propositional.defimpl

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

⇒ logic.propositional.notnot

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