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