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