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SOLUTION MANUAL FOR A CONCISE INTRODUCTION TO LOGIC 14TH EDITION PATRICK J HURLEY
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SOLUTION MANUAL FOR A CONCISE INTRODUCTION TO LOGIC 14TH EDITION PATRICK J HURLEY
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, SOLUTION MANUAL FOR A CONCISEINTRODUCTION TO LOGIC 14TH EDITION
PATRICK J HURLEY
Chapter 1: Basic Concepts
TABLE OF CONTENTS
Exercise Answers .................................................................................... 2
Exercise 1.1 .............................................................................................. 2
Exercise 1.2 ......................................................................................... 6
Exercise 1.3 ............................................................................................. 10
Exercise 1.4 ............................................................................................. 12
Exercise 1.5 ............................................................................................. 14
Exercise 1.6 ............................................................................................. 16
,EXERCISE ANSWERS
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 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.
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.
C: Women of the working class, especially wage workers, should not have more than
two children at most.
16. P1: The nations of planet earth have acquired nuclear weapons with an explosive
power equal to more than a million Hiroshima bombs.
P2: Studies suggest that explosion of only half these weapons would produce enough
soot, smoke, and dust to blanket the Earth, block out the sun, and bring on a
nuclear winter that would threaten the survival of the human race.
C: Radioactive fallout isn't the only concern in the aftermath of nuclear explosions.
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