2. All horses are useful;
This animal is useful;
Therefore this animal is a horse.
3. I ought not to study algebra because it is a very difficult subject.
4. Pupils ought not to write notes because note writing interferes with
the rights of others.
5. All fish can swim;
Charles can swim;
Therefore Charles is a fish.
6. Henry is a fool because he wears a white necktie.
7. All dogs bark;
This animal barks;
Therefore this animal is a dog.
+Theme XCIX.+--_Write a paragraph proving the truth of one of the
following propositions:_--
1. The government should establish a parcels post.
2. The laws of mind determine the forms of composition.
3. Training for citizenship should be given greater attention in the
public schools.
4. The members of the school board should be appointed by the mayor of the
city.
5. In the estimation of future ages ---- will be considered the greatest
President since Lincoln.
(State your premises. Have you shown that they are true?)
+181. Evidence.+--We may reach belief in the truth of a specific statement
by means of deductive reasoning. Commonly, however, when dealing with an
actual state or occurrence, we present other facts or circumstances that
show its existence. The facts presented may be those of experience, the
testimony of witnesses, the opinion of those considered as experts in the
subject, or a combination of circumstances known to have existed.
Pages:
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399