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