fact: Definition one (L : lambda_theory_data) : (L 0 : hSet) := abs (abs (app (pr (n := 1) (● 0)%stn))).
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.Combinatorics.StandardFiniteSets UniMath.Combinatorics.Tuples UniMath.AlgebraicTheories.AlgebraicTheories UniMath.AlgebraicTheories.LambdaTheoryCategoryCore