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