With respect to (1), UDT maximizes over worlds where the zillionth digit of pi is 1, 2, 3...8, 9, 10.
These are not different worlds for UDT, but a single world that can have different possible execution histories that state zillionth digit of pi to be 0,1,...,9. Mathematical intuition establishes a probability distribution over these execution histories for the fixed world program that defines the subject matter.
These are not different worlds for UDT, but a single world that can have different possible execution histories that state zillionth digit of pi to be 0,1,...,9. Mathematical intuition establishes a probability distribution over these execution histories for the fixed world program that defines the subject matter.