a real externality, which is the thing wanted, but a quasi-externality, with which, as the best that is to be had, he will in all probability rest contented. "X Y and Z," he will say, "are projected, as it were, out of the circle." This answer leaves the question as much unsolved as ever. Or,
4. A fourth man (and we beg the reader's attention to this man's answer, for it forms the fulcrum or cardinal point on which our whole demonstration turns)—a fourth man will say, "If the circle could only be brought within itself, so—
then the difficulty would disappear—the problem would be completely solved. X Y Z must now of necessity fall as extrinsic to the circle A; and this, too (which is the material part of the solution), without the limits of the circle A being over stepped."
Perhaps this may appear very like quibbling; perhaps it may be regarded as a very absurd solution—a very shallow evasion of the difficulty.
