Valid Vs Invalid Arguments 2.3 Quiz Test

As the term is used in logic, it makes no sense to describe an individual claim as “valid” or “invalid”.

An argument can have invalid logic but still qualify as a “good” argument.

If an argument is valid then by definition it’s a good argument.

1. All dogs bark. 2. Charlie is a dog. Therefore, Charlie barks.

1. Almost all dogs can play the piano. 2. Charlie is a dog. Therefore, Charlie can play the piano.

1. All dogs bark. 2. Charlie barks. Therefore, Charlie is a dog.

1. If there is no gas in the car then it won’t start. 2. The car started. Therefore, there is gas in the car.

1. The card you picked is either a Jack, a Queen or a King. 2. The card you picked is not a Jack. Therefore, the card you picked is either a Queen or a King.

1. Successful candidates for this job must have either a Master’s degree or five years of work experience. 2. Johnny has a Master’s degree. 3. Johnny got the job. Therefore, Johnny does not have five years of work experience.