Exercise logic.propositional.dnf.unicode
Description
Proposition to DNF (unicode support)
Derivation
![](http://ideas.cs.uu.nl/images/external.png)
¬(q → p) ↔ ((r ↔ s) ∨ ¬((F ∨ s) ∧ s) ∨ F)
⇒ logic.propositional.absorpand¬(q → p) ↔ ((r ↔ s) ∨ ¬s ∨ F)
⇒ logic.propositional.falsezeroor¬(q → p) ↔ ((r ↔ s) ∨ ¬s)