Exercise logic.propositional.dnf

Description
Proposition to DNF

Derivation

Final term is not finished

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

⇒ logic.propositional.notnot

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

⇒ logic.propositional.demorganor

~(~p /\ ~q) /\ (r <-> p)