Abstract
The phenomena of perception have been used by philosophers to kindle and fuel doubts about the reality of ‘the external world’, a phrase which points roughly in the direction of our natural environment. After grappling with problems, which trade under this title, one often discovers that the issues have less to do with the reality of anything which might be called ‘the external world’ and more to do with the reality of the problems themselves. In this paper I propose to examine three approaches to what might deserve to be labelled, ‘problems about theexternal world’.