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