Consequently, then, if the author, as appears to be the case from the passages we have quoted, thinks with Mr. Herbert Spencer that the notion of the absolute corresponds to an existence, and if he contents himself with maintaining its indeterminability, we may, if we like, consider this to be a singularly attenuated metaphysic, but we are not entitled to deny that it amounts to a departure from criticism and a return to metaphysic. If, on the other hand, criticism does at least suppose one fundamental datum,--thought, namely, and with the thought the thinking,--we are still forced to grant to Descartes, and consequently to metaphysic, the existence of the thinking subject; and hence that science which our author declares not to be one would be found already in possession of the claim by the single fact of what he has called the criticism of two fundamental postulates: I think, I am--I think the absolute, the absolute is. And is this then nothing? We are therefore of opinion that M. Liard ought to have concluded the second part of his work as he did the first--that is to say, that he ought to have shown the insufficiency of criticism as he did that of positivism. To our mind, criticism supposes metaphysic, as positivism supposes criticism. Metaphysic contains the reason of criticism, as criticism does that of positivism. Instead, then, of saying that metaphysic is not a science, we should rather call it the culminating point of science. But in place of following this natural order, which is, indeed, only his own method, our author has preferred to prove criticism right in the second part of his book, and metaphysic right in the third, by a sort of _saltus_, not contained in what goes before. He has chosen to appear nearer to Kant than he really is; has chosen to carry on his own evolution in Kant's manner, and to rebuild on different bases what he had demolished; but we shall see that this evolution is in reality quite different from that of Kant, and that his justification of criticism is only apparent, or at least if he defends it, this is really only in order subsequently to undermine it. III.