If your rebuttal comes down to accusing someone of being a flat earther when you're not even in one of the FE discussion forums, then it's time to throw in the towel.
Srsly, the long tradition here at FES is to not bring the FE stuff into the lower forums. Oh, sometimes people do anyway, of course, but for the most part we like to keep it separate. burt has never been a FEer, to my knowledge, but he would make a good one!