A handbook of logic by Joseph Gerard Brennan PDF

By Joseph Gerard Brennan

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All Republicans are Americans . All Republicans are Democrats. It is evident that simply because two subclasses happen to belong to one and the same class, it does not follow that they are identical with each other. Because ducks swim and you do too, it does not follow that you are a duck. ). ) . .. All labor unionists are Socialists. The middle term, "favor organization of the workers," is undistributed in each premise because it is the predicate term of an A proposition. (Review the topic of Distribution of Terms, pp.

6. Consider the following objections to the doctrine of existential import of particular propositions. Are they refutahIe? Discuss. I. "Particular propositions cannot assert existence. " 2. "At least some A propositions assert existence. " 3. " 7. Put the following propositions into one of the four forms: 2. 3. 4. 5. 6. I. 2. ab = ab = 3. ab =1= 4. ab =1= 0 0 0 0 32 A Handbook of Logic But instead of using (l and b for the subject and predicate terms, use the initials letter of one of the words composing the terms.

For all x, if x is a unicorn, x does not eat oats. 1. Some naiads are sorority sisters. There is at least one x such that x is a naiad and a sorority sister. O. Some dragons do not breathe fire. There is at least one x such that x is a dragon and does not breathe fire. (x)(Fx:::> Gx) (x)(Fx:::> -Gx) (3x) (Fx . Gx) (3x)(Fx' -Gx) QUESTIONS AND EXERCISES I. Which of the following are propositions? Of those that are propositions, which are simple and which are compound? I . Wallace Stevens is an American poet.

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A handbook of logic by Joseph Gerard Brennan

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