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