Despite reservations expressed in the literature, there is a strong case in the context of schooling for favouring the view that students should engage in an assessment of their teachers for intellectual trustworthiness if credulity on the part of students is to be avoided. J. S. Mill's suggestion that the judgment of open-minded individuals can be trusted is explored and defended; and it is further argued that students are in a position to determine whether or not their teachers are open-minded by asking certain questions about their approach and manner.