You were all over him like a cheap suit when you thought he was supporting you. Listen to RPenner you said. But now that he's called you out, suddenly it's RPenner should be silent! Problem is: 1] You haven't met the mininum requirement for making your case; you keep putting the onus on others. Show us your formulation for a parallelogram and how it is not what we observe. 2] Since you have not defended your idea, at some point there is nothing left to discuss but the fact that you keep making unsupported claims. Support your claims and we'll discuss that. But they're not really fact-based, are they? They're what you call common sense. Which unfortunately, doesn't apply. I know how you feel. I have limits to my knowledge too. Everyone does. But I know where they are, and when I decide to cross them, it's in the form of questions to my academic betters.