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