Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.truezeroand

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

⇒ logic.propositional.defimpl

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