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