Reading this, I actually felt my brain snap a little and I laughed hysterically until I couldn't breathe for about five minutes straight.

I think anyone just skipping over this bit here really needs to stop and consider more closely the magnitude of this completely true astute observation.

Don't know if you saw your sibling's response, but it's not how he's always talked (slightly different to what you said, I know). I forget what it was he was responding to, but you could see him blundering headlong into nearly discussing a classified programme OTR, and changed the tack of his sentence after a good eight seconds of pause. I'll see if I can find the moment, but I just sat there astounded at the blatancy of it.