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