Phaneroscopy, Semeiotic, Logic
Edited By Elize Bisanz
Exact Logic. Introduction. What is Logic?
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Exact Logic28 Introduction. What is Logic?
Logic is the Theory of Reasoning. Its main business is to ascertain the conditions upon which the just strength of reasoning depends. Such has always been understood to be its nature, at any rate, approximately; so that this statement, though it may be superseded as a scientific definition, yet like the meaning popularly attached to any common word, must forever be respected as alone authoritative in a vague sense. ← 35 | 36 →
If a more exact definition is asked for, logicians of different schools will give different replies.
Throughout the nineteenth century, the professors of logic in the universities have for the most part followed the lead of Kant although with innumerable divergences in every direction. If a logical doctrine of one of these sects (which we may collect under the designation of critical logic, giving them the appellative of Kant’s metaphysics) be attacked, it will be defended either by an ipse dixit, as self-evident, or by a remark about some language (most often German), or directly by some physiological phenomenon, or by a metaphysics or theory of cognition founded on psychology.
During a considerable part of the century, and outside of the universities, the most influential conception of logic has been that of John Stuart Mill. Although his book was written entirely in the interest of a metaphysics quite similar to that of Kant and founded mainly upon the psychological doctrine of association,...
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