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