I had to deal with someone who thought that having the last word is "a thing". So, he will never give up on any discussion without adding a last reply. It is hard to deal with such people.
On the game of go, can someone illustrate how it is advantageous to not have the last word?
Also, I am not sure if this example will convince a last-word-wrong-doer, they are in for an emotional satisfaction, not a rational one.