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