is long in being manifested only because of the desire to surround itself
by all the guaranties of truth concerning the object in question.

"The fifth blade of the fan is the quality of deduction--the most solid
basis for the judgments which are formed by common sense.

"By deduction we are able to solve all relative questions with
perfect accuracy.

"It is by abstracting reckless contingencies, and by relying only upon
the relativeness of facts, that we can succeed in discovering the truth
that there are too many representations as to these facts.

"Deduction is the great support of mental weakness. It helps in
discerning proportions, possibilities, even as it helps in skilfully
avoiding the fear of error."

We shall have occasion to speak more at length of deduction, for Yoritomo
devotes many pages to it. We shall, then, defer to a future chapter the
interesting developments that he discloses on this subject, and we shall
continue to study the fan of common sense with him.

"Foresight," he continues, "is rightly looked upon as one of the
indispensable elements in cultivating common sense.

"The faculty of foresight always accompanies common sense, in order to
strengthen its qualities of skill and observation.

"One must not confound, as many people are tempted to do, foresight and
conjecture.