[Footnote 3: _Connaissance._--The word cognition is used throughout as the English equivalent of this, except in places where the context shows that it means acquaintance merely.--ED.]
[Footnote 4: J. S. MILL, _An Examination of Sir Wm. Hamilton's Philosophy_, pp. 5 and 6. London. 1865.]
[Footnote 5: A few subtle philosophers have returned to it, as I shall show later in chapter iv.]
[Footnote 6: Thus, the perplexity in which John Stuart Mill finds himself is very curious. Having admitted unreservedly that our knowledge is confined to sensations, he is powerless to set up a reality outside this, and acknowledges that the principle of causality cannot legitimately be used to prove that our sensations have a cause which is not a sensation, because this principle cannot be applied outside the world of phenomena.]
[Footnote 7: See p. 18, _sup_.--ED.]
