Appreciate you. I think the problem my friends are having is more fundamental. If there’s 100 units of a currency, then making it divisible by another decimal place is the same as saying there are 1000 units.
I constructed a quick thought experiment that I think breaks this and this seemed to sway a 3rd friend who I talked to:
Thought experiment:
Scenario 1 - we have 100 units of currency and there are teacups available for purchase. The price of a teacup can never be more than 100 units, even with infinite divisibility.
Scenario 2 - we increase from 100 to 1000 units, and now teacups *could* be priced above 100 regardless of whether or not the original units of currency can be divided or not.
Why someone thinks adding more decimal places is that same as increasing the total pool is still beyond my understanding.
But this is now 3 people (1 who is questioning but not certain) that think these are the same thing. I am losing my mind over this.