Exercise logic.propositional.dnf
Description
Proposition to DNF
Derivation
~~~~(q || r || ~(q -> r))
⇒ logic.propositional.notnot~~(q || r || ~(q -> r))
⇒ logic.propositional.notnotq || r || ~(q -> r)
⇒ logic.propositional.defimplq || r || ~(~q || r)
⇒ logic.propositional.demorganorq || r || (~~q /\ ~r)
⇒ logic.propositional.notnotq || r || (q /\ ~r)