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.falsezeroor~~(~~q /\ ~r) || q || r
⇒ logic.propositional.notnot~~(q /\ ~r) || q || r