Right you are. Got it. Dichotomic search. That's what Mean Joe Green did when he anchored the Steel Curtain defense of the Pittsburgh Steelers in the Seventies. Joe would wrap his big arms around everybody in the offensive backfield and then begin the sort. He categorized players into dichotomous groups: those who did not have the ball and the one who did. He would eliminate from his grasp the former until all he had left was the latter. Dichotomic search. There you are.