i' United States, 116 S.Ct. 356, 371 (1995)(Stevens, J., dissenting). Just as a court's subject matter jurisdiction cannot be conferred by estoppel, Micklerl Nimishillen and Tuscarawas Railway Co., 13 F.3d 184, 189 (6' Cir. 1993), and Intercontinental Travel 44 EFTA00177094 Case 9:08-cv-80736-KAM Document 62 Ent