Exercise logic.propositional.dnf
Description
Proposition to DNF
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
r || ~(~q || r) || q || ~(~q || r) || q
⇒ logic.propositional.demorganorr || (~~q /\ ~r) || q || ~(~q || r) || q
⇒ logic.propositional.demorganorr || (~~q /\ ~r) || q || (~~q /\ ~r) || q
⇒ logic.propositional.idemporr || (~~q /\ ~r) || q
⇒ logic.propositional.notnotr || (q /\ ~r) || q
⇒ logic.propositional.absorporr || q