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INSTRUCTOR MANUAL FOR A CONCISE INTRODUCTION TO LOGIC 13TH EDITION PATRICK HURLEY
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INSTRUCTOR MANUAL FOR A CONCISE INTRODUCTION TO LOGIC 13TH EDITION PATRICK HURLEY
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, Exercise 1.1INSTRUCTOR MANUAL FOR A CONCISE INTRODUCTION TO
LOGIC 13TH EDITION PATRICK HURLEY
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Exercise Answers
Chapter 1
Exercise 1.1
Part I
1. P: Carbon monoxide molecules happen to be just the right size and shape, and happen to
have just the right chemical properties, to fit neatly into cavities within hemoglobin
molecules in blood that are normally reserved for oxygen molecules.
C: Carbon monoxide diminishes the oxygen-carrying capacity of blood.
2. P: The good, according to Plato, is that which furthers a person's real interests.
C: In any given case when the good is known, men will seek it.
3. P: The denial or perversion of justice by the sentences of courts, as well as in any other
manner, is with reason classed among the just causes of war.
C: The federal judiciary ought to have cognizance of all causes in which the citizens of other
countries are concerned.
4. P: When individuals voluntarily abandon property, they forfeit any expectation of privacy in
it that they might have had.
C: A warrantless search and seizure of abandoned property is not unreasonable under the
Fourth Amendment.
5. P1: Artists and poets look at the world and seek relationships and order.
P2: But they translate their ideas to canvas, or to marble, or into poetic images.
P3 Scientists try to find relationships between different objects and events.
P4: To express the order they find, they create hypotheses and theories.
C: The great scientific theories are easily compared to great art and great literature.
6. P1: The animal species in Australia are very different from those on the mainland.
P2: Asian placental mammals and Australian marsupial mammals have not been in contact in
the last several million years.
C: There was never a land bridge between Australia and the mainland
7. P1: We need sleep to think clearly, react quickly, and create memories.
P2: Studies show that people who are taught mentally challenging tasks do better after a good
.
1
, Exercise 1.1
night’s sleep.
P3: Other research suggests that sleep is needed for creative problem solving.
C: It really does matter if you get enough sleep.
.
2
, Exercise 1.1
8. P1: The classroom teacher is crucial to the development and academic success of the average
student.
P2: Administrators simply are ancillary to this effort.
C: Classroom teachers ought to be paid at least the equivalent of administrators at all levels,
including the superintendent.
9. P1: An agreement cannot bind unless both parties to the agreement know what they are doing
and freely choose to do it.
C: The seller who intends to enter a contract with a customer has a duty to disclose exactly
what the customer is buying and what the terms of the sale are.
10. P1: Punishment, when speedy and specific, may suppress undesirable behavior.
P2: Punishment cannot teach or encourage desirable alternatives.
C: It is crucial to use positive techniques to model and reinforce appropriate behavior that
the person can use in place of the unacceptable response that has to be suppressed.
11. P1: High profits are the signal that consumers want more of the output of the industry.
P2: High profits provide the incentive for firms to expand output and for more firms to enter
the industry in the long run.
P3: For a firm of above average efficiency, profits represent the reward for greater efficiency.
C: Profit serves a very crucial function in a free enterprise economy, such as our own.
12. P1: My cat regularly used to close and lock the door to my neighbor's doghouse, trapping
their sleeping Doberman inside.
P2: Try telling a cat what to do, or putting a leash on him--he'll glare at you and say, "I don't
think so. You should have gotten a dog."
C: Cats can think circles around dogs.
13. P1: Private property helps people define themselves.
P2: Private property frees people from mundane cares of daily subsistence.
P3: Private property is finite.
C: No individual should accumulate so much property that others are prevented from
accumulating the necessities of life.
14. P1: To every existing thing God wills some good.
P2: To love any thing is nothing else than to will good to that thing.
C: It is manifest that God loves everything that exists.
15. P1: The average working man can support no more than two children.
P2: The average working woman can take care of no more than two children in decent
fashion.
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