fact: Definition HM_W1 := pure_typable_intro_prenex M_W t_0_W 2 is_simple_t_0_W closed_t_0_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