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