Argues that pretence is one clear indication of rationality. Makes a suggestion about the kind of evidence of pretence in animals we should be looking for. This suggestion makes claims about pretence hard to justify by comparison with, say, claims about imitation; Appeals to Morgan's canon in defence of this stance. Suggests that we can learn something about pretence by connecting it with the phenomenon of seeing-in. Finally, offers a speculation on the evolutionary history of the capacity that underlies pretence.
Keywords: decentring, Morgan's canon, play, pretence, primates, rationality, seeing-in