“ All men are rational, some animals are men, therefore some animals are rational. ”
Bertrand Russell, A History of Western Philosophy (1945). copy citation
| Author | Bertrand Russell |
|---|---|
| Source | A History of Western Philosophy |
| Topic | animal |
| Date | 1945 |
| Language | English |
| Reference | |
| Note | |
| Weblink | http://www.ntslibrary.com/PDF%20Books/History%20of%20Western%20Philosoph... |
Context
“(Aristotle does not distinguish between these two forms; this, as we shall see later, is a mistake.)
Other forms are: No fishes are rational, all sharks are fishes, therefore no sharks are rational. (This is called “Celarent.”)
All men are rational, some animals are men, therefore some animals are rational. (This is called “Darii.”)
No Greeks are black, some men are Greeks, therefore some men are not black. (This is called “Ferio.”)
These four make up the “first figure”; Aristotle adds a second and third figure, and the schoolmen added a fourth.”
source
