My whole point is that it's possible. Forbidden, but possible.
I thought you were suggesting that it can't be forbidden, because it's impossible ("we can't forbid banks from lending more than they have since they just can't lend more than they actually have").
I wrote several times about this possibility in this thread. These are very intricate and technical details of actual banking (and accounting) which are irrelevant to how FRB works or what people mean by "creating money out of thin air"...
I must have misunderstood you. Thanks for the clarification.