RIF?
Academically, yes you're right. Practically, they are the same. No one can afford to sit around and wait a year or two to get rehired after layoffs, if that ever happens; and anytime a RIF happens, the positions are usually refilled once finances are better.
No harm or shame in not knowing it--lucky 10,000 and all that--but taking a chance to learn over blaming others would be my choice.
Edit: otoh I've been a bit grumpy myself this week so who am I to judge. It wasn't a very good joke. I'll tell you the "youthful porpoise" one next time