so to speak, on the thread of his one individuality and each adapted to a
particular use, or as varied functions of a single mind: in either case we
are dealing with a single individuality, and how we may picture the
wheel-work of the mental mechanism is merely a question of what picture
will bring the nature of its action home to us most clearly. Therefore, as
a matter of convenience, I shall in these lectures speak of this dual
action as though it proceeded from two minds, an outer and an inner, and
the inner mind we will call the subjective mind and the outer the
objective, by which names the distinction is most frequently indicated in
the literature of the subject.

A long series of careful experiments by highly-trained observers, some of
them men of world-wide reputation, has fully established certain remarkable
differences between the action of the subjective and that of the objective
mind which may be briefly stated as follows. The subjective mind is only
able to reason _deductively_ and not inductively, while the objective mind
can do both. Deductive reasoning is the pure syllogism which shows why a
third proposition must necessarily result if two others are assumed, but
which does not help us to determine whether the two initial statements are
true or not. To determine this is the province of inductive reasoning which
draws its conclusions from the observation of a series of facts. The
relation of the two modes of reasoning is that, first by observing a
sufficient number of instances, we inductively reach the conclusion that a
certain principle is of general application, and then we enter upon the
deductive process by assuming the truth of this principle and determining
what result must follow in a particular case on the hypothesis of its
truth. Thus deductive reasoning proceeds on the assumption of the
correctness of certain hypotheses or suppositions with which it sets out:
it is not concerned with the truth or falsity of those suppositions, but
only with the question as to what results must necessarily follow supposing