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

by George Hastings McNair

(11) Offer a few suggestions for remembering the special canons.

(12) Why did Aristotle attach so much importance to reduction in logic?

(13) Justify calling the first figure the “perfect figure,” and the others the “imperfect figures.”

(14) Treat of the relative value of the four figures.

(15) Show by illustration that the second figure is the exclusive figure.

(16) Test the following moods in all the figures: E
I
A O
A
O I
A
I

A
E
O E
I
O E
A
O A
E
O A
I
E E
E
I A
O
I A
A
I A
I
I.

12. QUESTIONS FOR ORIGINAL THOUGHT AND INVESTIGATION.

(1) Give an illustration of a syllogism in the fourth figure which might just as well be written in the first figure.

(2) May a syllogism, which is invalid in the fourth figure, be made valid by writing it in the form of the first figure? Prove it.