"No Person Who Cries Is a Person Who Can Be

Multiple Choice

"No person who cries is a person who can be trusted.Fred is a logic professor.No untrustworthy person is a logic professor.Therefore, Fred does not cry." To tell if this argument is valid, we must:

A) choose the relevant premises for deriving the conclusion and test the resulting syllogism for validity.The other premises are not relevant and need not be tested.
B) first derive the conclusion "some logic professors do not cry" and test that syllogism for validity.
C) first derive the conclusion "Fred is a trustworthy person" and test that syl- logism for validity.Then test a second syllogism which has that conclusion as a premise.
D) do nothing, since this argument is illogical.The conclusion cannot be derived from what is given.