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Validity and Soundness

Quiz by Griffin Kiegiel

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25 questions
Show answers
  • Q1
    Evalauate 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 and Sound
    Invalid and Unsound
    Invalid and Sound
    Valid and Unsound
    30s
  • Q2
    Which of the following premises makes this argument valid? Barbara earned a 3.5 GPA in her first semester. Barbara is a good student.
    Students that earn a 3.5 GPA are good students.
    Usually good students earn a 3.5 GPA or better.
    Good students earn high GPAs.
    No good students earns less than a 3.0 GPA.
    30s
  • Q3
    Evaluate the following argument: All monkeys are primates. All primates are mammals. All monkeys are mammals.
    Unsound
    Sound
    30s
  • Q4
    All valid deductive arguments are sound arguments.
    False
    True
    30s
  • Q5
    Evaluate the following argument: My girlfriend’s dog is a rabbit. All rabbits are named Butch. My girlfriend’s dog is named Butch.
    Invalid
    Valid
    30s
  • Q6
    A deductive argument cannot be both valid and unsound.
    True
    False
    30s
  • Q7
    Which of the following premises makes this argument valid? Matthew Sampson is an ultra -liberal in his political views. He doen't have a chance of being elected governor of this state.
    Some ultra-liberals are elected governor of this state.
    Most people elected governor are not ultra liberals.
    Some ultra-conservatives are elected governor of this state.
    No person with ultra-liberal views has a chance of being elected governor of this state.
    30s
  • Q8
    Evaluate the following argument: All dogs are mammals. All dogs have hearts. Therefore, all mammals have hearts.
    Valid
    Invalid
    30s
  • Q9
    An invalid deductive argument could have all true statements in it.
    False
    True
    30s
  • Q10
    A deductive argument could have a false premise and still be sound.
    True
    False
    30s
  • Q11
    Which of the following premises makes this argument valid? Max barks. Therefore, Max is a dog.
    Anything that barks is a dog.
    If something is a dog, then it will bark.
    All dogs bark.
    Most dogs bark.
    30s
  • Q12
    Evaluate the following argument: It is December. December is in the wintertime. So it must be snowing.
    Invalid and Unsound
    Valid and Unsound
    Valid and Sound
    Invalid and Unsound
    30s
  • Q13
    Evaluate the following argument: All whales can fly. Anything that is able to fly can shoot lasers with their mind. All whales can shoot lasers with their minds.
    Invalid
    Valid
    30s
  • Q14
    When the conclusion of a deductive argument is true, the argument must be sound.
    False
    True
    30s
  • Q15
    Evaluate the following argument: Some birds are cockatiels. All cockatiels are birds. Therefore, all birds are cockatiels.
    Valid
    Invalid
    30s

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