fact: Definition another (h p : X) : X := odflt a [pick d | d != h & d != p].
imports: Reals Lra mathcomp(all_ssreflect ssralg ssrnum) mathcomp(mathcomp_extra reals Rstruct) infotheo(ssrR realType_ext Reals_ext proba) monae_lib hierarchy monad_lib fail_lib proba_lib