Validity and Soundness
Quiz by Griffin Kiegiel
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25 questions
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- Q1Evalauate 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 SoundInvalid and UnsoundInvalid and SoundValid and Unsound30s
- Q2Which 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
- Q3Evaluate the following argument: All monkeys are primates. All primates are mammals. All monkeys are mammals.UnsoundSound30s
- Q4All valid deductive arguments are sound arguments.FalseTrue30s
- Q5Evaluate the following argument: My girlfriend’s dog is a rabbit. All rabbits are named Butch. My girlfriend’s dog is named Butch.InvalidValid30s
- Q6A deductive argument cannot be both valid and unsound.TrueFalse30s
- Q7Which 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
- Q8Evaluate the following argument: All dogs are mammals. All dogs have hearts. Therefore, all mammals have hearts.ValidInvalid30s
- Q9An invalid deductive argument could have all true statements in it.FalseTrue30s
- Q10A deductive argument could have a false premise and still be sound.TrueFalse30s
- Q11Which 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
- Q12Evaluate the following argument: It is December. December is in the wintertime. So it must be snowing.Invalid and UnsoundValid and UnsoundValid and SoundInvalid and Unsound30s
- Q13Evaluate 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.InvalidValid30s
- Q14When the conclusion of a deductive argument is true, the argument must be sound.FalseTrue30s
- Q15Evaluate the following argument: Some birds are cockatiels. All cockatiels are birds. Therefore, all birds are cockatiels.ValidInvalid30s