Logic; Or, The Analytic of Explicit Reasoning |
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Page iii
... Logic that recent logical theories diverge widely from the old Logic of Aristotle and the Schoolmen , and no less widely from each other . From this it hap- pens that , under the common name of Logic , we have many doctrines essentially ...
... Logic that recent logical theories diverge widely from the old Logic of Aristotle and the Schoolmen , and no less widely from each other . From this it hap- pens that , under the common name of Logic , we have many doctrines essentially ...
Page iv
... Logic , in the true sense of the term , is no longer taught or learned anywhere ; but has become a lost art . But while the logicians of the day are thus at variance among themselves , there is un- fortunately one point in which they ...
... Logic , in the true sense of the term , is no longer taught or learned anywhere ; but has become a lost art . But while the logicians of the day are thus at variance among themselves , there is un- fortunately one point in which they ...
Page vi
... logical principles ; all of which will be practically illustrated in treating of the fallacies . Here , then , I think , we have a practical proof of the indispensable utility of Logic , and the consequent refutation of the error that ...
... logical principles ; all of which will be practically illustrated in treating of the fallacies . Here , then , I think , we have a practical proof of the indispensable utility of Logic , and the consequent refutation of the error that ...
Page vii
... logical principles , yet owing to the logical decadence of the age , and the general disuse of Logic , this mode of refutation is unavailable . Hence under existing conditions , there is no practical means of stemming the tide of moral ...
... logical principles , yet owing to the logical decadence of the age , and the general disuse of Logic , this mode of refutation is unavailable . Hence under existing conditions , there is no practical means of stemming the tide of moral ...
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Common terms and phrases
¹ See Appendix accident affirmative proposition analysis animal apodictic applied argument Aristotle assumed called the Fallacy class denoted common commonly concepts or notions consists constitute contradictory conversion copula corresponding defined definition distinction distinguished division doctrine equal equation equivalent Equivocation error essential example exclusively fact FALLACIES IN DICTIONE Fallacy of Accident Fallacy of Composition Fallacy of Division false fictitious formal former genus gism Hence Hobbes Ignoratio Elenchi illicit assumption illicit substitution included individuals inference Irrelevant Conclusion judgment kind knowledge lacies language latter Laws of Thought logical processes logicians mankind Material Fallacies mathematical meaning middle term minor premise Moral Sciences nature negative nonsensical notions or concepts observed obviously opinions political predicate principle quasi-things ratiocination rational regarded relations of terms RIGHT REASONING rules Secundum Quid sense simply Sovereignty species syllogism theory things thought tion true truth utility Whately words Y is X
Popular passages
Page 90 - If two triangles have two sides of the one equal to two sides of the...
Page 170 - is the science of the operations of the understanding which are subservient to the estimation of evidence; both the process itself of proceeding from known truths to unknown, and all other intellectual operations in so far as auxiliary to this.
Page 131 - By what steps we are to proceed in these is to be learned in the schools of the mathematicians, who from very plain and easy beginnings, by gentle degrees, and a continued chain of reasonings, proceed to the discovery and demonstration of truths that appear at first sight beyond human capacity.
Page 222 - He was bred to the law, which is, in my opinion, one of the first and noblest of human sciences ; a science which does more to quicken and invigorate the understanding, than all the other kinds of learning put together ; but it is not apt, except in persons very happily born, to open and to liberalize the mind exactly in the same proportion.
Page 16 - And the most part of men, though they have the use of reasoning a little way, as in numbering to some degree, yet it serves them to little use in common life, in which they govern themselves, some better, some worse according to their differences of experience, quickness of memory, and inclinations to several ends; but specially according to good or evil fortune, and the errors of one another. For as for 'science,' or certain rules of their actions, they are so far from it that they know not what...
Page 216 - A servant who was roasting a stork for his master, was prevailed upon by his sweetheart to cut off a leg for her to eat. When the bird came upon table, the master desired to know what was become of the other leg. The man answered, that storks had never more than one leg.
Page 219 - For some part of the inestimable benefit of that book has, merely on account of its title, reached to many thousands more than, I fear, it would have done, had he called it (what it is merely) a grammatical Essay, or a Treatise on Words or on Language.
Page 221 - But when they knew that he was a Jew, all with one voice about the space of two hours cried out, Great is Diana of the Ephesians.
Page 215 - But I have understanding as well as you; I am not inferior to you: yes, who knows not such things as these?
Page 18 - First, I say, you must not despond, Athenians, under your present circumstances, wretched as they are; for that which is worst in them as regards the past is best for the future. What do I mean? That your affairs are amiss, men of Athens, because you do nothing...