I’m a sales guy. In sales it is common ideology to not accept “no” as an answer. You should pursue a line of questioning that uncovers a customers underlying needs wants and desires. One word answers are a trap.
As an instructor however one word answers can be powerful reinforcement for the self directed leaner. Chances are, the fewer words you feel compelled to use the more self directed the student. It generally means they have put effort into examining their own thinking and are capable of accepting minimum direction.
Encourage your students to phrase their questions in such a manner that a simple yes or no will suffice. Resist the temptation to explain yourself and “feed” the student.
Simple yes or no answers can be extremely effective at setting, and even renewing, direction for the self directed learner.