In this way it begs the fundamental question at issue-how if we are aware only of private ideas or sense-data can we justifiably infer that there are external objects?— and can hardly be used to answer it. If the Representative Theory is to be regarded as a hyothesis to explain the course of our sensations, confirmation of this part of it must be sought rather in the various communications with other persons and the multifarious activities of social life, which are prior to scientific experiment and hypothesis.