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