ABSTRACT
My chief aim in this chapter is to apply the principles of my reformed empiricism to the problem of the external world and thereby solve it. To achieve this aim I must deal with a cluster of issues concerning the nature of the external world and the proper interpretation of physical theories. I must also deal with some loose ends that I did not tie down in the last chapter, one being the manner in which contingent assumptions required for the evaluation of observation reports and the application of Bayes' theorem can be rationally justified.
