We begin to see, then, how the nature of knowledge meets the puzzle which I stated above. How, I asked, can a connected “world,” whose parts act on one another quite independently of my perception, be in my individual mind? I answer that it does not follow, because the world _is for me_ {13} only in my presentation, that my presentation is the only thing which goes on in the world. “What I am obliged to think” may represent a real development depending on laws and a system which is not confined to my individual course of consciousness. The “objective” in this sense is for Logic an assumption, or rather a fact to be analysed. We do not attempt to prove its existence, except in the sense of calling attention to its nature in detail. It will be seen that “outside the mind” ceases, on this view of objectivity, to have meaning as regards anything that can be related to us. “Outside” is a relation of bodies to one another; but everything, about which we can so much as ask a question, is so far inside the mind, _i.e._ given in its continuum of presentation or idea. I will recapitulate the three conceptions of the “objective.” (1) According to practical “common sense” the objective is independent of our consciousness in the sense that the presence or absence of our consciousness makes no difference to the operation of things upon each other. (2) According to “common-sense theory” the objective is independent of our consciousness in the sense that the presence or absence of our consciousness makes no difference in the mode of being of things (viz. that the world in consciousness approaches objectivity by resembling or reproducing a similar and quite objective world outside consciousness). (3) According to philosophical theory the objective is independent of our consciousness in the sense that it is what we are constrained to think in order to make our consciousness consistent with itself. “What we are constrained to {14} think” is not confined, in its _reference_ to our thought, or to thought at all. _Our separate worlds._