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