Here's a screenshot from episode 1 of Mike Maloney's "Hidden Secrets of Money" series.

According to this, even the central banks can't make money. They can only print currency. But currency isn't money as it isn't a store of value. Since more can always be printed, and IS being printed, it's not a store of value, so isn't money.

If you're interested in learning more about it, the link to his series is here.

I recommend it!