This is yet one more attempt to distort the original meaning of the law by drawing attention to specific words that are immaterial to the original intent of the law.

The states are in fact printing money which is not gold or silver no matter how you look at it... It doesn't matter that they are all printing the same currency. This activity is happening within the physical confines of individual states and they are using that money to pay their debts.

The simplest interpretation is the correct one. Especially when you consider the history of the US.

If the law was merely about not allowing states have sovereignty over their own fiat currencies then they would not have mentioned the words 'gold' or 'silver'.