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