I prefer to argue that many real-world problems are AMD-like, because there’s a nonzero chance of returning to the same mental state later, and that chance has a nonzero dependence on what you choose now. To the extent that’s true, CDT is not applicable and you really need UDT, or at least this simplified version. That argument works even if the universe contains only one agent, as long as that agent has finite memory :-)
I prefer to argue that many real-world problems are AMD-like, because there’s a nonzero chance of returning to the same mental state later, and that chance has a nonzero dependence on what you choose now. To the extent that’s true, CDT is not applicable and you really need UDT, or at least this simplified version. That argument works even if the universe contains only one agent, as long as that agent has finite memory :-)