 Unfortunately this condition does not constrain answers sufficiently because any account of representation that fills the blank in a way that satisfies the surrogative reasoning condition will almost invariably also cover other kinds of representations. Speed camera photographs give the police information about drivers breaking the law, a cardboard model of the palace instructs us about its layout and proportions, and a weather map shows you where to expect rain. These representations are therefore are likely to fall under an account of representation that explains surrogative reasoning. Hence, representations other than scientific representations also allow for surrogative reasoning, which raises the question: how do scientific representations differ from other kinds of representations that allow for surrogative reasoning? Callender and Cohen (2006: 68–69) point out that this is a version Popper’s demarcation problem, now phrased in terms of representation, and so we refer to it as the Representational Demarcation Problem.