My mind is racing for ways to ask hard questions and or to create discussions just beyond the reach of the class. In this case, I want to call on students who think they are right. Then I need to show the class that our loudest member does not have all of the answers. Next i will engage a shy quiet student in the classroom discussion. If i can encourage the shy kid to solve the issue.
This may invite a talk about how we all learn in different ways.