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)) ∨ (q → p))) ↔ ((r ↔ s) ∨ ¬s)
⇒ logic.propositional.idempand(T ∧ ¬((q → p) ∨ (q → p))) ↔ ((r ↔ s) ∨ ¬s)
⇒ logic.propositional.defimpl(T ∧ ¬(¬q ∨ p ∨ (q → p))) ↔ ((r ↔ s) ∨ ¬s)