Hi! I think it's always best to answer these questions honestly but one thing I always emphasize is that I make sure that I take time to process the argument and then respond when I'm feeling calmer. I honestly tell them that I want to respond in the most rational way possible and that if I answer back with a hot-head, I may not. I use an example where a PI said something really problematic and I took some time to process the comment itself and think about how I wanted to address it, and then emailed the PI and set up a meeting so we can work through the comment and how it affected me.