A two-person method to simulate die rolls (2023)

> We can prove that in an ideal situation, the die roll will be fair. Assuming both parties can come up with unbiased random numbers ranging from [0;12)...

Doesn't that assumption remove the entire problem though? I thought the whole reason for the method was that people can't easily think of an unbiased random number.

Or put differently, if that's your starting point, what's stopping you from simply doing (A mod 6) + 1?

Does seem like each person could just secretly write down any number, they are revealed, added and mod 6'd.

Is all this angular difference stuff a fancy way of saying mod 6?