; they have held that allegations or evidence, taken as a whole, that are as consistent with conscious parallelism as with agreement are generally insufficient to survive a motion to dismiss or motion for summary judgment; and they have concluded a claimant must offer allegations or evidence tending to exclude the possibility of independent action. See, e.g., Brooke Grp. Ltd. v. Brown & Williamson Tobacco Corp., 509 U.S. 209, 227 (1993); Matsushita Elec. Indus. Co. v. Zenith Radio Corp., 475 U.S. 574, 588 (1986)