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