Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.notnot

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

⇒ logic.propositional.falsezeroand

~~(F || p) || F || q