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