You can always tell from the typical MO of ending each post with a snarky jab intended to goad you into making a reply. Then his next post is as short dismissive with another goading jab.
It's intended to drive you away from the discussion and into frustration to the point that you just stop engaging in the subject.
-PJ
I almost think that some of these agitators are AI, programmed to stir up trouble.