@inquiline @aral @SallyStrange To preserve myself, i ask them a yes/no question: "Is Israel an apartheid state?"
All words clearly well defined, no excuse to an open ended answer.
So far they try to argue without a clear answer. I then say "it's a yes-or-no answer".
I then disengage. Someone who complicates an apartheid is not someone I want around.
No one ever said "no", but if they do, my idea is to say "we can disagree on opinions but if we disagree on facts, no debate is ever possible".