work with daily in other legal spheres—like the “rule of rea-son”inantitrustlaworthe“arbitraryandcapricious”standard for agency decisionmaking.See Standard Oil Co.of N. J. v. United States, 221 U. S. 1, 62 (1911); Motor Vehi-cle Mfrs. Assn. of United States, Inc. v. State Farm Mut. Au-tomobileIns.Co.,463U.S.29,42–43(1983).Applyinggen-eralstandardstoparticularcasesis,inmanycontexts,justwhatitmeanstodolaw.