ABSTRACT
Philosophers are all too familiar with the standard epistemological worry that people belief that feelings and emotions lurk behind the outward behaviour of others cannot be justified. The conceptual version of the other minds problem has affinities with venerable idealist doctrines. Brewer identifies the core assumptions that can be traced to Berkeley's doorstep, since his own tactic parallels that of Locke's reply to the bishop. Berkeley's approach is still attractive as a means of understanding the nature of experience. A crucial part of learning about perceptual experiences involves attending to behavioural responses as much as it involves demonstrative referencing. Since the problem generalizes to other forms of experiences, there are prima facie advantages in thinking of experiences as kinds of creature-relative responses directed at aspects of the world. However, to fully understand triangulation the notion of response that lies at the heart of this principle must be subdivided.
