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3. I.—A Plea for Excuses: The Presidential Address
4. Bosanquet, Bernard. The Essentials of Logic Being Ten Lectures on Judgment and Inference. London: MacMillan and Co, 1906.
5. Bradley, F. H. The Principles of Logic. London: William Clowes and Sons, 1883. http://archive.org/details/principleslogic01bradgoog.