Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

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

⇒ logic.propositional.falsezeroand

~p -> (q || F)

⇒ logic.propositional.falsezeroor

~p -> q

⇒ logic.propositional.defimpl

~~p || q

⇒ logic.propositional.notnot

p || q