Require Export coqlib.
Parameter _ソクラテス : Entity.
Parameter _人間 : Entity -> Prop.
Theorem t1: (and True (exists x, (and (_人間 x) (exists e, (and (and ((Nom e) = x) True) ((Nom e) = _ソクラテス)))))) -> (and True (exists x, (and (_人間 x) (exists e, (and (and ((Nom e) = x) True) ((Nom e) = _ソクラテス)))))). Set Firstorder Depth 1. nltac. nltac_set; nltac_final. Set Firstorder Depth 3. nltac_final. Qed.