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

by George Hastings McNair

Most (more than half) of the team are seniors,

Most (at least half) of the team are under twenty,

∴ Some students under twenty are seniors.

Here we have an I
I
I which is evidently valid. No term distributed and yet the conclusion is unquestionably true. This is due to the fact that the propositions are so worded as to force an overlapping of the major and minor terms. The student may illustrate this relation by circles.

6. OUTLINE.

INCOMPLETE SYLLOGISMS AND IRREGULAR ARGUMENTS.

(1) Enthymeme.

First, second and third orders.

Natural form.

(2) Epicheirema.