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