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