Every A is X│All the △ is in the ○ A

No B is X│None of the □ is in E

│the ○

∴ No A is B│None of the △ is in E

│the □

is the only way in which a universal negative conclusion can be drawn.

III. In what manner can a particular affirmative conclusion be drawn;

namely, that part or all of one figure is contained in the other? Only

when we are able to assert that the whole circle is part of one of the

figures, and that the whole, or part of the circle, is part of the other

figure. We have then two forms.

First notions of logic (preparatory to the study of geometry) · 第 11 / 28 题