I believe it was "Sufficiently reasonable evaluator of evidence" - which I was using roughly equivalently to Bayesian empiricist. I'm beginning to doubt that is what ibidem means by it.
TheOtherDave defined it way back in the thread to try to taboo "rationalist," since that word has such a multitude of denotations and connotations (including the LW intended meanings). Edit: terminology mostly defined here and here.
Sufficiently reliable, but otherwise yes. That said, we've since established that ibidem and I don't have a shared understanding of "reliable" or "evidence," either, so I'd have to call it a failed/incomplete attempt at tabooing.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.