Definition

rational dialogue - a mode of communication in which I set the terms of discourse such that they support my agenda.

Or, as sophiaserpentia says:

Those who oppose equality complain that expressions of anger or anguish are “unfair” because they cannot “argue against” them. And what allows them to say this is the idea that there is a ‘culture war’ which should stop and be replaced by ‘rational dialogue,’ an artificially stultified form of discourse designed to allow opponents of equality to cite “logically and rationally” why they should continue to have special rights not shared by the disadvantaged, essentially allowing them to ignore everything and anything the disadvantaged say.