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