[N. Theknow]

One can not engage in debate with someone who interrupts you with memorized talking points, doesn’t answer direct questions, changes the subject on a dime, and responds to your well-mannered and thoughtful approach with ridicule.

And when they sense that they have lost the argument, they just start calling names.

[left that other site]

Yes. That too. I forgot that, but you are completely right about that.