I guess I am missing out on what the big deal is and why the semantics of "common sense" or not make any difference whatsoever. The point was simply for him to know how to use a QR correctly, which apparently does not matter because he does not have a QR.

I'm not very good at arguing the finer (and perhaps unnecessary) points of language and semantics in this context, nor do I care to, so I will just drop it. Hopefully, you will do likewise.