A Class Room Logic: Deductive and Inductive, with Special Application to the Science and Art of TeachingMcNair, George Hastings
Philosophy
A Class Room Logic: Deductive and Inductive, with Special Application to the Science and Art of Teaching
McNair, George Hastings
Logic
Complete syllogism.
All true teachers are just,
You are a true teacher,
(Hence) You are just.
Enthymeme of _first order_; major premise omitted.
..........................
You are a true teacher,
(Hence) You are just.
Enthymeme of _second order_; minor premise omitted.
All true teachers are just,
..........................
(Hence) You are just.
Enthymeme of the _third order_; conclusion omitted.
All true teachers are just,
(And) You are a true teacher,
..........................
To argue in terms of the complete syllogism is the _unusual_, not the
_usual_ method. We have a way of abbreviating our remarks; expressing
only the necessary and leaving the obvious to be taken for granted.
Thus the enthymeme becomes the natural form of expression. But the mere
fact that a part of the argument is omitted, makes it more essential
for the student to think clearly and with careful continuity, that no
error may intrude itself.
Probably the most common enthymemes are those of the first order.
This may be explained by the fact that the major premise is usually the
most universal of the three propositions, and, in consequence, the one
which would be the most generally understood. The following represent
enthymemes of this order, gleaned from the ordinary conversation of
ordinary people:
(1) “Your beets won’t grow, because you are planting them in the
wrong time of the moon.”
(2) “You, being a member of the Sunday School, should be ashamed of
such language.”
(3) “Being the son of your father, you ought to have some pride in
this matter.”
(4) “We are going to have an open winter, because I have observed
that the hornets’ nests are near the ground.”
(5) “You had better put in lots of coal, for I have noticed that the
squirrels have gathered in more nuts than usual.”
Judging from these enthymemes, it would seem to be more natural to
assert the conclusion and follow this by a reason in the form of a
minor premise, leaving the _major_ to the intelligence of the auditor.
The enthymeme of the second order occurs only infrequently, since
it seems to be an unnatural mode of expression, though sometimes it
appears to lend emphasis to the conclusion; e. g., “All untrustworthy
boys come to a bad end, and I predict that you will come to a bad end.”
Enthymemes of the third order are commonly used for the sake of
emphasis, as the following make evident:
(1) “No business man wants an indolent boy, and you are indolent.”
(2) “All successful teachers are interested in their work, and you
plan to be a successful teacher.”
(3) “Humility is a sign of greatness, and Lincoln possessed this
quality.”
=2. EPICHEIREMA.=
Public-domain text, read in full here on John Shaqi.
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