Not naming names here, but here's how it goes:
"I think X is better than Y because of Z"
"Really, well I disagree, I think Y is better than X because of A".
"Hmm, but what about B, C or D?"
"No, I don't think they are that important".
"Ok, well we shan't be convincing each other, let's agree to disagree and let's move on shall we?"