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 DEVIL STORIES little Presbyterian Scotch doctor, working to cheat the Devil out of his soul, can accomplish an amazing deal in twenty years. He even went so far as to take into consideration mere humbugs; for, if he could cheat the enemy with a humbug, why not? The only pain in that case, would be the mortification of having stooped to an inadequate adversary—a foeman unworthy of his steel. So he weighed such queries as the old scholastic brocard, An chimoera bombinans in vacuo devorat secundas intentiones? and that beautiful moot point wherewith Sir Thomas More silenced the challenging schoolmen of Bruges, An averia carrucae capta in vetito nomio sint irreplegibilia?

He glanced a little at the subject of conundrums; and among the chips from his workshop is a really clever theory of conundrums. He has a classification and discussion of them, all his own, and quite ingenious and satisfactory, which divides them into answerable and unanswerable, and, under each of these, into resemblant and differential.

For instance: let the four classes be distinguished with the initials of those four terms, A. R., A. D., U. R., and U. D.; you will find that the Infinite Possible Conundrum (so to speak) can always be reduced under one of those four heads. Using symbols, as they do in discussing syllogism—indeed, by the way, a conundrum is only a jocular variation in the syllogism, an intentional fallacy for fun (read Whately's Logic, Book III., and see if it isn't so)—using symbols, I say, you have these four "figures:"—

I. (A. R.) Why is A like B? (answerable): as, Why [186]