Intersubjective Engagements without Theory of Mind: A Cross-Species Comparison Professor Daniel D. Hutto Professor of Philosophical Psychology School of Humanities University of Hertfordshire de Havilland Campus Hatfield Hertfordshire AL10 9AB Telephone: +44 (0)1707 285655 Email: d.d.hutto@herts.ac.uk In naturalistic settings, great apes exhibit impressive social intelligence. Despite this, experimental findings are equivocal about the extent to which they are aware of other minds. At the high level, there is only negative evidence that chimpanzees and orangutans understand the concept of belief, even when simplified non-verbal versions of the ‘location change’ false belief test are used (Call & Tomasello, 1999). More remarkably, even the evidence that they are aware of simpler mental states – such as seeing – is equivocal and ‘decidedly mixed’ (Call & Tomasello 2005, p. 61). At best, there appear to be signature limits to simian capacities in this regard. In addition, there exists a range of proposals about what lies behind their particular form of social intelligence. Within the cognitivist camp, these range from positing a Naïve, Weak, or Minimal Theory of Mind (Bogdan 2009, Tomasello, Call and Hare 2003, Apperly and Butterfill 2009); Perceptual Mindreading (Bermúdez 2009); an Early Mindreading System (Nichols and Stich 2003); or a Theory of Behaviour (Povinelli and Vonk 2004).