In other words, communication is always somewhat rational. Communication could not occur if the participants thought that the speech acts exchanged did not carry the weight of a validity for which those participating could be held accountable. Nor would anyone feel that a conclusion was justified if it was achieved by any other means than the uncoerced force of the better argument. Nor could the specialized discourses of law, science and morality continue if the progress of knowledge and insight was denied in favor of relativism.