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