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