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