First of all If you leave is because you have reached the breaking point and generally you don't care anymore also frankly I don't believe in this argument whatsoever because it's used to justify rants and pointless arguments most of the time so sorry I'm not buying it
As for not telling the truth I was not referring about real truths as him saying the truth but I was simply saying that he was wasting his time.

Besides I've seen plenty of arguments that are based on half-truths and when I asked some why the extra part of the facts have been ignored usually ppl didn't answer