This book should not be read.
2. This hammer is useful.
3. That dog will bite.
4. This greyhound can run rapidly.
5. The leaves have fallen from the trees.
6. That boy ought to be punished.
7. It is too early to go nutting.
8. This boy should not study.
9. You ought not to vote for this man for mayor.
+Theme XCVIII.+--_Write a paragraph proving the truth of one of the
following propositions:_--
1. Labor-saving machinery is of permanent advantage to mankind.
2. New Orleans will some day be a greater shipping port than New York.
3. Poetry has a greater influence on the morals of a nation than prose
writing.
4. Boycotting injures innocent persons and should never be employed.
5. Ireland should have Home Rule.
6. The President of the United States should be elected by the direct vote
of the people.
(Consider your argument with reference to the suppressed premises.)
+180. Errors of Deduction.+--The deductive method of reasoning, if
properly used, is effective, but much care needs to be taken to avoid
false conclusions. A complete exposition of the variations of the
syllogism is not necessary here, but it will be of value to consider
briefly three chief errors.
If the terms are not used with the same meaning throughout, the conclusion
is valueless. A person might agree with you that domestic arts should be
taught to girls in school, but if you continued by saying that scrubbing
the floor is a form of domestic art, therefore the girls should be taught
to scrub the floor, he would reject your conclusion because the meaning of
the term _domestic art_ as he understood it in the first statement, is not
that used in the second.
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