We develop a criterion for telling when integrating two pieces of information, e.g. two pictures or statements requires an understanding of perspective. Problems that require such an understanding are perspective problems. With this criterion we can show that understanding false beliefs vis-à-vis reality pose a perspective problem, so does understanding spatial descriptions given from different viewing points (a classical example of what is commonly seen as a problem of perspective) and individuating objects with different sortals (naming objects). We use the (...) result that understanding false belief as well as alternative naming of objects are both perspective problems to explain the otherwise inexplicable developmental finding that children master these two tasks at about the same time, around the age of 4 years. (shrink)

b>: The problem of how physical systems, such as brains, come to represent themselves as subjects in an objective world is addressed. I develop an account of the requirements for this ability that draws on and refines work in a philosophical tradition that runs from Kant through Peter Strawson to Gareth Evans. The basic idea is that the ability to represent oneself as a subject in a world whose existence is independent of oneself involves the ability to represent space, and (...) in particular, to represent oneself as one object among others in an objective spatial realm. In parallel, I provide an account of how this ability, and the mechanisms that support it, are realized neurobiologically. This aspect of the article draws on, and refines, work done in the neurobiology and psychology of egocentric and allocentric spatial representation. (shrink)