149

G127

of experience, in order to ascertain how far they are borne out. At the time of writing those papers, I had only succeeded in tracing out a few consequences of the hypothesis, those few being all of the same character. Since that time I have deduced one more consequence of a different character. I will begin by explaining what the former class of consequences are. Logicians generally assume, though in many cases tacitly, that we can by logical analysis find what concepts are truly simple, or are relatively so. But I am not sure