(3) Solution by Euler’s Method of Diagrams.
The Major Premiss requires only one Diagram, viz.
| 1 |
[pg181]The Minor requires three, viz.
| 2 |
| 3 |
| 4 |
The combination of Major and Minor, in every possible way requires nine, viz.
Figs. 1 and 2 give
| 5 |
| 6 |
| 7 |
| 8 |
| 9 |
Figs. 1 and 3 give
| 10 |
| 11 |
| 12 |