fact: Definition HM_W2 := pure_typable_intro_prenex (sval HM_W1) t_1_W n_W is_simple_t_1_W closed_t_1_W.
imports: List Lia Undecidability.SystemF.SysF Undecidability.SystemF.Autosubst.syntax Undecidability.SystemF.Util(Facts poly_type_facts pure_term_facts term_facts typing_facts pure_typing_facts pure_typable_prenex) ssreflect ssrbool ssrfun