Honestly, Roses, it was a name I'd seen around lots as well. Invariably posting the same thing, but never substantiating their arguments or considering anything tricky or asking/answering questions.
The 'oh I was definitely totes GC but now I've changed my mind because of you lot' shtick didn't, IIRC, work consistently with their posting history.
So there was that.
But mostly, I didn't find that poster's argument convincing, because they weren't really making much of an argument. I have the same issue with your posts, tbh.
Sorry - I'm not deliberately trying to be horrible, honestly. Just frustrated...