Deductive Logic

Deductive Logic, by St. George
Stock

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Title: Deductive Logic
Author: St. George Stock
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DEDUCTIVE LOGIC
BY
ST. GEORGE STOCK, M.A.
PEMBROKE COLLEGE, OXFORD

PREFACE.
One critic, who was kind enough to look at this book in manuscript,
recommended me to abandon the design of Publishing it, on the ground
that my logic was too like all other logics; another suggested to me to
cut out a considerable amount of new matter. The latter advice I have
followed; the former has encouraged me to hope that I shall not be

considered guilty of wanton innovation. The few novelties which I
have ventured to retain will, I trust, be regarded as legitimate
extensions of received lines of teaching.
My object has been to produce a work which should be as thoroughly
representative of the present state of the logic of the Oxford Schools as
any of the text-books of the past. The qualities which I have aimed at
before all others have been clearness and consistency. For the task
which I have taken upon myself I may claim one qualification--that of
experience; since more than seventeen years have now elapsed since I
took my first pupil in logic for the Honour School of Moderations, and
during that time I have been pretty continuously engaged in studying
and teaching the subject.
In acknowledging my obligations to previous writers I must begin with
Archbishop Whately, whose writings first gave me an interest in the
subject. The works of Mill and Hamilton have of course been freely
drawn upon. I have not followed either of those two great writers
exclusively, but have endeavoured to assimilate what seemed best in
both. To Professor Fowler I am under a special debt. I had not the
privilege of personal teaching from him in logic,--as I had in some
other subjects; but his book fell into my hands at an early period in my
mental training, and was so thoroughly studied as to have become a
permanent part of the furniture of my mind. Much the same may be
said of my relation to the late Professor Jevons's Elementary Lessons in
Logic. Two other books, which I feel bound to mention with special
emphasis, are Hansel's edition of Aldrich and McCosh's Laws of
Discursive Thought. If there be added to the foregoing Watts's Logic,
Thomson's Outlines of the Laws of Thought, Bain's Deductive Logic,
Jevons's Studies in Deductive Logic and Principles of Science,
Bradley's Principles of Logic, Abbott's Elements of Logic, Walker's
edition of Murray, Ray's Text-book of Deductive Logic, and
Weatherley's Rudiments of Logic, I think the list will be exhausted of
modern works from which I am conscious of having borrowed. But, not
to forget the sun, while thanking the manufacturers of lamps and
candles, I should add that I have studied the works of Aristotle
according to the measure of my time and ability.

This work has had the great advantage of having been revised, while
still in manuscript, by Mr. Alfred Robinson, Fellow of New College, to
whom I cannot sufficiently express my obligation. I have availed
myself to the full of the series of criticisms which he was kind enough
to send me. As some additions have been made since then, he cannot be
held in anyway responsible for the faults which less kindly critics may
detect.
For the examples at the end I am mainly indebted to others, and to a
large