Elements of Logic: Designed as a Manual of InstructionButler, 1860 - 285 pages |
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Expressions et termes fréquents
abstract ambiguity analysis animals antecedent applied apprehension assert axioms Bacon belong Cæsar called categorical propositions Celarent Christianity Church classification clusion common term compound propositions conclusion conditional syllogisms consequent consider Convert the minor copula Darii definition deny dictum of Aristotle differentia dilemma disjunctive distributed divided division enthymeme error establish evident example expressed Fakoro Fallacy of Division false Ferio figure formal fallacies genus gism horse illicit process illustrate imperfect mood Individual Trees induction investigation irrelevant conclusion kinds laws logical form logicians major premiss major term material fallacies meaning men are mortal ment method middle term mind minor term mortal nature object observed paronyms Philosophy predicate prefix prem quadrupeds quantity reason reduced religion rules simple sion sition sorites species subject-matter summum genus syllogistic form synthesis things tion true truth undistributed universal affirmative universal negative universal proposition valid words write
Fréquemment cités
Page 187 - President, when the mariner has been tossed, for many days, in thick weather, and on an unknown sea, he naturally avails himself of the first pause in the storm, the earliest glance of the sun, to take his latitude, and ascertain how far the elements have driven him from his true course.
Page 280 - Ay, in the catalogue ye go for men, As hounds and greyhounds, mongrels, spaniels, curs, Shoughs," water-rugs," and demi-wolves, are clept All by the name of dogs ; the valued file...
Page 280 - He that is of God heareth God's words : ye therefore hear them not, because ye are not of God.
Page 157 - All true patriots are friends to religion ; Some great statesmen are not friends to religion : Some great statesmen are not true patriots.
Page 125 - ... example, the mood AAI, in the first figure, because it is implied and contained in the mood AA A. Since, if the universal conclusion A be true, the particular I is necessarily true. By an application of each of these moods to every figure, we shall have left, finally, nineteen moods in all; or, FOUR in the first figure, FOUR in the second, six in the third, and FIVE in the fourth. The moods of the first figure are called perfect moods; those in the other figures, imperfect moods. As it has been...
Page 281 - Non video. Nam qui cupiet, metuet quoque: porro Qui metuens vivit, liber mihi non erit unquam.
Page 201 - Note, that if the middle term is ambiguous, there are in reality two middle terms, in sense, though but one in sound. An ambiguous middle term is either an equivocal term used in different senses in the two premises ; (eg " Light is contrary to darkness ; Feathers are light; therefore Feathers are contrary to darkness...
Page 283 - Rabbi, we know that thou art a teacher come from God: for no man can do these miracles which thou doest, except God be with him.
Page 134 - ... 2. None but Whites are civilized : the ancient Germans were Whites : therefore they were civilized. 3. None but Whites are civilized : the Hindoos are not Whites : therefore they are not civilized. 4. None but civilized people are Whites : the Gauls were Whites : therefore they were civilized. 5. No one is rich who has not enough : no miser has enough : therefore no miser is rich.
Page 205 - Mingling as it does with the superstition in our nature, we deem those things more probable than they are, which we desire or fear. The wish is father to the thought, for pleasant hopes: and presentiments of evil are taken for its probable coming, in our gloomy periods. We give a rule by the use of which all this may be avoided. Rule.—The probability of any event is expressed by a fraction, of which the numerator is the number of chances in its favour, and the denominator is the sum of all the...