"It is a conversation ender." I have no doubt the author is correct, but I suspect it's frequently not because they have won or settled the issue at hand, but

"It is a conversation ender." I have no doubt the author is correct, but I suspect it's frequently not because they have won or settled the issue at hand, but rather signaled that they are not willing to have a reasonable conversation about it. When you have someone using a slur, it's probably a mutual scenario, where that person isn't interested in being reasonable either. In many other cases, this technique is a symptom of disagreeableness and a sign of someone to generally avoid.