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Phil. 103: Introduction to Logic
Quiz 3: Truth, Validity, and Soundness

Fall 2002 ©2002 OPL

Carefully study statements 1-10 Decide whether each statement is true or false and write in the spaces provided the word ``true'' or the work ``false'' in accordance with your decision.

  1. __________________________ A sound argument is a valid deductive argument with true premisses.
  2. __________________________ All valid deductive arguments are sound arguments.
  3. __________________________A deductive argument cannot be both valid and unsound.
  4. __________________________An invalid deductive argument could have all true statements in it.
  5. __________________________In a valid deductive argument the conclusion could be true or false.
  6. __________________________A deductive argument could have a false premiss and still be sound.
  7. __________________________If a deductive argument is sound, then the conclusion must be true.
  8. __________________________When the premisses of a deductive argument are true, the conclusion is always true as well.
  9. __________________________When the conclusion of a deductive argument is true, the argument must be sound.
  10. __________________________A deductive argument can be either valid or invalid and still have true premisses.

NAME ____________________________________________________

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Phil. 103: Introduction to Logic
Quiz 3: Truth, Validity, and Soundness

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Lee Archie 2002-11-17