fact: Definition exfalso_option_some_none : forall (T : Type) (A : Type) (a : A), Some a = None -> T := fun T A a e => match e in @paths _ _ t return match t with | Some _ => Unit | _ => T end with | idpath => tt end.
imports: Coq(ssreflect) HoTT(HoTT) HoTT_additions Hierarchy