say (some version of) “hey man, it looks like you don’t have the ‘step outside your current frame’ skill, and I don’t think the argument is worth having until you do.”
Maybe a more diplomatic way could be: “hey man, for the sake of thought experiment, could we for a moment consider this thing from a different frame?” They may agree or refuse, but probably won’t feel offended.
Maybe a more diplomatic way could be: “hey man, for the sake of thought experiment, could we for a moment consider this thing from a different frame?” They may agree or refuse, but probably won’t feel offended.