Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.truezeroand

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

⇒ logic.propositional.defimpl

~(~q || r) || ~~q || r

⇒ logic.propositional.demorganor

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

⇒ logic.propositional.notnot

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