We'll just hang a sign saying "I'm with stupid..."

ME: Okay, now I don't quite recall, are there multiple buildings at your site?
CALLER: Yeah, there's more than one.
ME: No problem. Which building is this printer in?
CALLER: It's in the same building I'm in.
ME: And that is...?
CALLER: I dunno, I'm already here, so I never have to look.