I just checked, and that's definitely not what I meant.

How else should one interpret this sentence other than, "I've already corrected you on this, so you should know better"?

> We've been through this argument, recently, and I'm a little disappointed that you're framing this observation as if that discussion hadn't occurred already.

I don't know, but we can be sure that I didn't mean it that way; we now have an authoritative citation for that.