The conclusion is true because the two premises of the argument are true. The logic of the syllogism is valid. Therefore the conclusion is true. A syllogism can fail if either premise is untrue. Statement No. 1.
All college students read books.
Statement No. 2. Carol reads books. Statement No. 3. Carol is a college student. When the argument is presented in the structure of a syllogism, faulty logic is easy to discern.