A new logic / by Charles Mercier.

  • Mercier, Charles Arthur, 1852-1919.
Date:
1912
Catalogue details

Licence: In copyright

Credit: A new logic / by Charles Mercier. Source: Wellcome Collection.

    71/458 (page 39)
    For this classification, I substitute, in the Logic here pro- pounded, the following :— 1. The Incomplete Proposition, or Problem—What is B ? 2. The Complete proposition with unified terms, or the Categorical Proposition—A is B. 3. The Complete proposition with relations for terms, or the Analogical Proposition—The relation between A and B is like the relation between C and D. Each of these forms of proposition is divisible into sub-varieties, some of which are important, and some unimportant. The forms of the Problem are three, according to the element that is missing :— a. The missing element is the Subject—What is B ? b. The missing element is the Ratio—Is A, B ? c. The missing element is the Object—A is what ? The forms of the Categorical Proposition also are three :— a. The Categorical Proper—A is B. b. The Compound proposition—A and B are both C. c. The Conditional proposition—A is conditionally B. The forms of the Analogical Proposition are two, according to the nature of the relation :— a. The relation of a to b is like the relation of c to d. b. The relation of a to b is unlike the relation of c to d. Further divisions of the Problem, and of the Categorical proposition will come into view when we consider them separately and in more detail.