COM-362 Topic 5 Reading Exercises Assignment

Complete the exercises in the attached document, “Reading Exercises.” These exercises are also in the textbook, refer to your text should you have questions or need further examples.

Attachments COM362_T5_Reading_Exercises.docx

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Topic 5 Reading Exercises

Copi, Irving M. Introduction to Logic, 14th Edition. Routledge.

EXERCISE A INSTRUCTIONS

State the converses of the following propositions, and indicate which of them are equivalent to the given propositions:

PROBLEMS

  1. No people who are considerate of others are reckless drivers who pay no attention to traffic regulations.
  1. All graduates of West Point are commissioned officers in the U.S. Army.
  1. Some European cars are overpriced and underpowered automobiles.
  1. No reptiles are warm-blooded animals.
  1. Some professional wrestlers are elderly persons who are incapable of doing an honest day’s work.

EXERCISE B INSTRUCTIONS

State the obverses of the following propositions:

PROBLEMS

  1. Some college athletes are professionals.
  1. No organic compounds are metals.
  1. Some clergy are not abstainers.
  1. No geniuses are conformists.
  2. All objects suitable for boat anchors are objects that weigh at least fifteen pounds.

EXERCISE C INSTRUCTIONS

State the contrapositives of the following propositions and indicate which of them are equivalent to the given propositions.

PROBLEMS

  1. All journalists are pessimists.
  1. Some soldiers are not officers.
  1. All scholars are nondegenerates.
  1. All things weighing less than fifty pounds are objects not more than four feet high.
  1. Some noncitizens are not nonresidents.

EXERCISE D INSTRUCTIONS

If “All socialists are pacifists” is true, what may be inferred about the truth or falsehood of the following propositions? That is, which can be known to be true, which can be known to be false, and which are undetermined?

PROBLEMS

  1. Some nonpacifists are not nonsocialists.
  1. No socialists are nonpacifists.
  1. All nonsocialists are nonpacifists.
  1. No nonpacifists are socialists.
  1. No nonsocialists are nonpacifists.
  1. All nonpacifists are nonsocialists.
  1. No pacifists are nonsocialists.
  1. Some socialists are not pacifists.
  2. All pacifists are socialists.
  3. Some nonpacifists are socialists.

EXERCISE E INSTRUCTIONS

If “No scientists are philosophers” is true, what may be inferred about the truth or falsehood of the following propositions? That is, which can be known to be true, which can be known to be false, and which are undetermined?

PROBLEMS

  1. No nonphilosophers are scientists.
  1. Some nonphilosophers are not nonscientists.
  1. All nonscientists are nonphilosophers.
  1. No scientists are nonphilosophers.
  1. No nonscientists are nonphilosophers.
  1. All philosophers are scientists.
  1. Some nonphilosophers are scientists.
  2. All nonphilosophers are nonscientists.
  3. Some scientists are not philosophers. No philosophers are nonscientists.

EXERCISE F INSTRUCTIONS

If “Some saints were martyrs” is true, what may be inferred about the truth or falsehood of the following propositions? That is, which can be known to be true, which can be known to be false, and which are undetermined?

PROBLEMS

  1. All saints were martyrs.
  1. All saints were nonmartyrs.
  1. Some martyrs were saints.
  1. No saints were martyrs.
  1. All martyrs were nonsaints.
  1. Some nonmartyrs were saints.
  1. Some saints were not nonmartyrs.
  1. No martyrs were saints.
  1. Some nonsaints were martyrs.
  1. Some martyrs were nonsaints.
  1. Some saints were not martyrs.
  1. Some martyrs were not saints.
  1. No saints were nonmartyrs.
  1. No nonsaints were martyrs.
  2. Some martyrs were not nonsaints.
  1. If “Some merchants are not pirates” is true, what may be inferred about the truth or falsehood of the following propositions? That is, which can be known to be true, which can be known to be false, and which are undetermined?
  1. No pirates are merchants.
  2. No merchants are nonpirates.
  3. Some merchants are nonpirates.
  4. 4. All nonmerchants are pirates.
  5. Some nonmerchants are nonpirates.
  6. All merchants are pirates.
  7. No nonmerchants are pirates.
  8. No pirates are nonmerchants.
  9. All nonpirates are nonmerchants.
  10. Some nonpirates are not nonmerchants.
  11. Some nonpirates are merchants.
  12. No nonpirates are merchants.
  13. Some pirates are merchants.
  14. No merchants are nonpirates.
  15. No merchants are pirates.

Course: COM-362 Argumentation and Advocacy
School: Grand Canyon University

  • 10/05/2020
  • 85
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