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.idempand(¬¬q ∧ ¬p) ↔ ((r ↔ s) ∨ ¬¬¬s)
⇒ logic.propositional.notnot(q ∧ ¬p) ↔ ((r ↔ s) ∨ ¬¬¬s)