Dodson, 288 F.3d 153, 160 (5th Cir. 2002); see also United States v. Olano, 507 U.S. 725, 113 S. Ct. 1770, 123 L. Ed. 2d 508 (1993) (waiver is the intentional relinquishment of a known right). The known right here was the at least arguable right to obtain a lesser-...