A System of Logic, Ratiocinative and Inductive (Vol. 1 of 2)
John Stuart Mill · en
to be a man, he _is not_ a man, and any assertion which can be
made concerning men does not at all regard him, nor is affected as
to its truth or falsity by anything in which he is concerned.
The reviewer says that if the major premiss included the
conclusion, “we should be able to affirm the conclusion without
the intervention of the minor premiss; but every one sees that
that is impossible.” It does not follow, because the major premiss
contains the conclusion, that the words themselves must show all
the conclusions which it contains, and which, or evidence of
which, it presupposes. The minor is equally required on both
theories. It is respecting the functions of the major premiss that
the theories differ; whether that premiss merely affirms the
existence of proof, or is itself part of the proof—whether the
conclusion follows from the minor and major, or from the minor and
the particular instances which are the foundation of the major. On
either supposition, it is necessary that the new case should be
perceived to be one coming within the description of those to
which the previous experience is applicable; which is the purport
of the minor premiss. When we say that all men are mortal, we make
an assertion reaching beyond the sphere of our knowledge of
individual cases; and when a new individual, Socrates, is brought
within the field of our knowledge by means of the minor premiss,
we learn that we have already made an assertion respecting
Socrates without knowing it: our own general formula is, to that
extent, for the first time _interpreted_ to us. But according to
the reviewer’s theory, it is our having _made_ the assertion which
proves the assertion: while I contend that the proof is not the
assertion, but the grounds (of experience) on which the assertion
was made, and by which it must be justified.