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