“…In contrast, the effectiveness of pyramiding depends upon the level of knowledge that individuals have about each other (known as social metaknowledge or transactive memory in the organisation and management science literature, see for example Wegner, Giuliano, and Hertel 1985, Wegner 1987,1995, Austin 2003, Borgatti and Cross 2003, Reagans, Argote, and Brooks 2005, Ren, Carley, and Argote 2006. Therefore, it should logically vary according to how many know the target individual, whether the sought-after bit of information is observable, interesting, or for some other reason widely known, and so on.…”