Traditional Logic I Chap. 2
|The two properties of Simple Apprehension|| 1. Comprehension|
|Comprehension||The completely articulated sum of the intelligible aspects, or elements (or notes) represented by a concept.|
|Comprehension of Animal|| sentient|
|Comprehension of Man|| rational|
|Notes||The simple concepts (or categories) used to define a complex concept.|
|Porphyrian tree|| Invented by the 3rd century logician, Porphyry.|
It gives us a convenient way to break down a complex concept into the simple concepts out of which it is made.
|Porphyrian Tree diagram|
|Extension|| To ask what is the extension of a concept is to ask, "To what does the concept man refer?"|
Answer: All the men who have ever lived, who are now living, and who will live in the future.
|The Relationship between Comprehension and Extension||The greater the comprehension a concept has, the less extension it has; and the more extension it has, the less comprehension.|