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