fact: Definition v n := match n with 0 => true | 1 => true | _ => false end.
imports: UniMath.MoreFoundations.Notations UniMath.MoreFoundations.Bool UniMath.Combinatorics.StandardFiniteSets UniMath.Combinatorics.MoreLists UniMath.Algebra.Universal.Algebras UniMath.Algebra.Universal.VTerms