 "I'm going for a walk with him and I think he thinks he's going for a walk with me and he thinks I think I'm going for a walk with him and...")

In "The Construction of Social Reality" (1995), Searle addresses the mystery of how social constructs like "baseball" or "money" can exist in a world consisting only of physical particles in fields of force.Adapting an idea by Elizabeth Anscombe in "On Brute Facts," Searle distinguishes between "brute facts", like the height of a mountain, and "institutional facts", like the score of a baseball game.Aiming at an explanation of social phenomena in terms of Anscombe's notion, he argues that society can be explained in terms of institutional facts, and institutional facts arise out of collective intentionality through constitutive rules with the logical form "X counts as Y in C".