This isn't about reflexivity because the argument is precisely that dollars are not reflexive over time when it comes to their functionality as money, and your example doesn't hold either.

Either way, instead of wasting so much time on shitposting you might want to actually use that same energy on trying to actually understand what is being said.

Perhaps you might even be able to figure out that 1 USD at time t (e.g. in the year 1995) is almost never the same as 1 USD at time s =/= t (e.g. today). Your example doesn't hold regardless of the presence of a central bank as it concerns the argument at hand.