 What is being claimed by a theorist who argues, as Bratman does, that group intentions are “built out of” the attitudes of group members? Or, as Dretske does, that footprints are “partly built out of” a foot-strike? A social entity (a group intention or a footprint) is held to stand in some relation R1 to other entities (member attitudes or a past foot-strike). What is this relation R1—and is there just one such relation, or are there many ways that social entities are “built out of” their constituents?