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