<p>So, one trick a professor can use upon making (or especially being caught in) a mistake is to announce that he or she was just checking to see if anyone is paying attention… </p>
<p>In this case, however, I really do apologize for that.</p>
<p>So, one trick a professor can use upon making (or especially being caught in) a mistake is to announce that he or she was just checking to see if anyone is paying attention… </p>
<p>In this case, however, I really do apologize for that.</p>