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