Exercise logic.propositional.dnf.unicode
Description
Proposition to DNF (unicode support)
Derivation
Final term is not finished
(¬((¬q ∧ ¬q) ∨ p) ∨ ¬(q → p)) ↔ ((r ↔ s) ∨ ¬s)
⇒ logic.propositional.defimpl(¬((¬q ∧ ¬q) ∨ p) ∨ ¬(¬q ∨ p)) ↔ ((r ↔ s) ∨ ¬s)