Excerpt from Logic

Separation of the facts and laws of Nature into departments for the convenience of study, has been one of the chief con ditions of scientific progress. It is true that such separation is made for our convenience and does not exist in Nature. Yet it has been the means of revealing the unity of Nature, the connection of facts, the harmony of laws: analysis has been the necessary preliminary to an intelligent synthesis. No further apology need be offered for the separation of Logic, in the present volume, from all other studies, and especially from Psychology and Metaphysics, with greater rigour than has been usual in logical treatises: carrying out the plan that elsewhere has always proved advantageous. The instructed reader will easily see that I have been chie?y indebted to Mill's system of Logic, Professor Bain's Logic, Dr. Venn's Empirical Logic, and Dr. Keynes' Formal Logic. What ever is due to other authors has been acknowledged as occasion arose. In every case I have tried to make the property con veyed my own: an excuse for theft that must seem odd to a lawyer, but is well recognised in the courts of literature.

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