Is TDT accurately described by "CDT + acausal comunication through mutual emulation"?
I view TDT as a bit unnatural, UDT is more natural to me (after people explained TDT and UDT to me).
I think of UDT as a decision theory of 'counterfactually equitable rational precommitment' (?controversial phrasing?).
So you (or all counterfactual "you"s) precommit in advance to do the [optimal thing], and this [optimal thing] is defined in such a way as to not give preferential treatment to any specific counterfactual version of you. This is vague. Unfortunately the project to make this less vague is of paper length.
:)
Folks working on UDT, feel free to chime in to correct me if any of above is false.
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