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