The book Practical Logic Or the Art of Thinking was written by author Daniel Seely Gregory Here you can read free online of Practical Logic Or the Art of Thinking book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Practical Logic Or the Art of Thinking a good or bad book?
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These must be tested by the Canons of Reasoning, which will be presented in Part III. (3. ) Judgments from Testimony and Authority. Testi- mony is the statement of others concerning matters of fact which they have observed in their own consciousness or in the world around them. Authority is the statement of others concerning matters of opinion which they have reached by the processes of conception, judgment, and rea- soning. The testimony or authority may be recorded on 104 PRACTICAL LOGIC. mon...uments or in writings, books, etc. , or given by word of mouth. As almost all human knowledge is received on testimony or authority, the question, What are the tests of testimony and authority ? becomes a most important one. The tests are to be found either, first, in the ability, character and number of witnesses or authorities, or, secondly, in the character of that which they present. Out of these arise the Rules to be observed in judging of the truth or falsity of judgments received from others.
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