Now it is precisely in this further sense that I wish to consider: what reason have we for believing that certain particular things, other than ourselves, our own perceptions, and what we directly perceive, are real? I have asserted that I do have certain perceptions, which it is very unlikely I should have, unless some other person had certain particular perceptions; that, for instance, it is very unlikely I should be having precisely those perceptions which I am now having unless someone else were hearing the sound of my voice. And I now wish to ask: What reason have I for supposing that this is unlikely? What reason has any of us for supposing that any such proposition is true? And I mean by "having a reason" precisely what I formerly meant. I mean: What other proposition do I know, which would not be true, unless my perception were connected with someone else's perception, in the manner in which I asserted them to be connected? Here again I am asking for _a good reason_; and am not asking a psychological question with regard to origin. Here again I am not asking for a reason, in the strict sense of Formal Logic; I am merely asking for a proposition which would probably not be true, unless what I asserted were true. Here again I am asking for some proposition of a kind which _each_ of us believes; I am asking: What reason has _each_ of us for believing that some of his perceptions are connected with particular perceptions of other people in the manner I asserted?--for believing that he would not have certain perceptions that he does have, unless some other person had certain particular perceptions? And here again I am asking for a _reason_--I am asking for some proposition _other_ than one which itself asserts: When one man has a perception of such and such a particular kind, it _is_ probable that another man has a perception or thought of this or that other kind.