Formal performance evaluations in the professional world are conducted using realistic situations. Physicians are allowed to consult medical texts freely, attorneys may refer to law books and case records, and physicists and engineers have their manuals at hand for ready reference. Students, then, should likewise have access to their textbooks whenever they take examinations.
The reasoning in the argument is questionable because the argument cites examples that are insufficient to support the generalization that performance evaluations in the professional world are conducted in realistic situations.