A Class Room Logic / Deductive and Inductive, with Special Application to the Science and Art of Teaching

by George Hastings McNair

This argument is in the first figure, the mood being

A
A
A. All the propositions are affirmative and universal, consequently the rules pertaining to negatives and particulars are inapplicable. “A” distributes the subject only, hence all the subjects are underscored. The middle term “dog” is distributed in the major premise, and the minor term “greyhound,” which is distributed in the conclusion, is likewise distributed in the minor premise. The argument is, therefore, valid in form. This may be verified by referring to a list of valid moods in the first figure.

(2) E  No G
prejudiced person is M
open to conviction,

A  All S
fair minded persons are M
open to conviction,

E ∴ No S
fair minded person is G
prejudiced.

The argument is in the second figure; mood

E
A
E. There is one negative premise and the conclusion is negative; no particulars. “E” distributes both terms, “A” the subject only. The middle term is distributed in the major premise. Both major and minor terms are distributed in the conclusion, but they are likewise distributed in the premises where they are used. The argument is, therefore,valid. Reference to the valid moods of the second figure confirms this conclusion.

(3) A  All M
good citizens G
vote,