Rasmuson, 807 F.3d at 1345 (quoting Walther v. Sec’y of Health & Human Servs., 485 F.3d 1146, 1152 (Fed. Cir. 2007)); cf. Gen. Elec. Co. v. Joiner, 522 U.S. 136, 149-50 (1997) (Breyer, J., concurring) (observing that subjecting expert opinions to appropriate legal standards “will help secure the basic objectives of . . . the ascertainment of truth and the just determination of proceedings” (citing F ed. R. eVid. 102)); Olson, 292 U.S. at 257 (“[T]o allow mere speculation and conjecture to become a guide for the ascertainment of value [is] a thing to be condemned in business transactions as well as in judicial ascertainment of truth.”).