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Validity and Soundness

Quiz by Jessica Willson

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25 questions
Show answers
  • Q1
    A sound argument is a valid deductive argument with true premises.
    FALSE
    TRUE
    30s
  • Q2
    A deductive argument cannot be both valid and unsound.
    TRUE
    FALSE
    30s
  • Q3
    All valid deductive arguments are sound arguments.
    TRUE
    FALSE
    30s
  • Q4
    A deductive argument can be either valid or invalid and still have true premises.
    FALSE
    TRUE
    30s
  • Q5
    When the conclusion of a deductive argument is true, the argument must be sound.
    TRUE
    FALSE
    30s
  • Q6
    When the premises of a deductive argument are true, the conclusion is always true as well.
    FALSE
    TRUE
    30s
  • Q7
    If a deductive argument is sound, then the conclusion must be true.
    TRUE
    FALSE
    30s
  • Q8
    A deductive argument could have a false premise and still be sound.
    FALSE
    TRUE
    30s
  • Q9
    In a valid deductive argument the conclusion could be true or false.
    TRUE
    FALSE
    30s
  • Q10
    An invalid deductive argument could have all true statements in it.
    FALSE
    TRUE
    30s
  • Q11
    Evlauate the following argument: Either President Lincoln was assassinated, or he was killed in an accident. President Lincoln was not killed in an accident. Therefore, President Lincoln must have been assassinated.
    Valid but not sound
    Sound but not valid
    Neither sound nor valid
    Both sound and valid
    30s
  • Q12
    Either Princess Diana was assassinated, or she was killed in an accident. Princess Diana was not killed in an accident. So Princess Diana must have been assassinated.
    Valid but not sound
    Sound but not valid
    Neither sound nor valid
    Both sound and Valid
    30s
  • Q13
    It is December. December is in the wintertime. So it must be winter.
    Sound but not valid
    Valid but not sound
    Both sound and Valid
    Neither sound nor valid
    30s
  • Q14
    It is December. December is in the wintertime. So it must be snowing.
    Both sound and Valid
    Neither valid nor sound
    Sound but not valid
    Valid but not sound
    30s
  • Q15
    Which of the following premises makes this argument valid? Barbara earned a 3.5 GPA in her first semester. Barbara is a good student.
    No good student earns less than a 3.0 GPA.
    Usually good students earn earn 3.5 GPA or better.
    All students who earn GPAs of 3.5 in the first semester are good students.
    Good students earn high GPAs.
    30s

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