Exercise logic.propositional.dnf
Description
Proposition to DNF
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
(F || (~q /\ (F || ~((p -> q) || F)))) -> p
⇒ logic.propositional.falsezeroor(~q /\ (F || ~((p -> q) || F))) -> p
⇒ logic.propositional.falsezeroor(~q /\ ~((p -> q) || F)) -> p
⇒ logic.propositional.falsezeroor(~q /\ ~(p -> q)) -> p
⇒ logic.propositional.defimpl(~q /\ ~(~p || q)) -> p
⇒ logic.propositional.demorganor(~q /\ ~~p /\ ~q) -> p
⇒ logic.propositional.notnot(~q /\ p /\ ~q) -> p