I don't have too much issue because when it's bad, it's usually because they've failed pretty hard on tech screens for questions that have absolute answers. I

I don't have too much issue because when it's bad, it's usually because they've failed pretty hard on tech screens for questions that have absolute answers. I have on one occasion had to pull up my IDE and run code and prove my questions to an argumentative candidate, but generally people appreciate the explanations when they are wrong and tell me they've learned something.