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

by George Hastings McNair

In the hypothetical form the argument is valid since the minor premise denies the consequent. Reducing tothe categorical gives mood

A
E
E in the second figure. This is valid.

Hypothetical:

(3) If the wind blows from the south, it will rain;

But the wind is not blowing from the south,

Hence it is not going to rain.

Categorical:

A  M
South wind brings G
rain,

E  S
This wind is not a M
south wind,