 Accordingly, Schier argues that depiction can be defined in terms of natural generativity and recognition: a picture is the kind of representation that causes naturally generated interpretations in competent spectators by activating their recognitional skills. Thus, “pictures are symbols whose interpretation can be causally explained by relevant recognitional abilities” (Schier 1986: 49). Specifically, “a picture of O is precisely something which can trigger the interpreter’s O-recognising abilities” (Schier 1986: 195).