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