This is a linkpost for https://intelligence.org/2017/04/07/decisions-are-for-making-bad-outcomes-inconsistent/
Can someone briefly explain to me the difference between functional and updateless decision theory / where FDT performs better? That would be much appreciated. I have not yet read FDT because it does not mention UDT (I checked) and I want to understand why UDT needs "fixing" before I invest the time.
"UDT" is ambiguous and has been used to refer to a number of different approaches; "FDT" is a new name for the central cluster of UDT-ish theories (excluding some similar theories like TDT), intended to be less ambiguous and easier to explain (especially to working decision theorists).
In part it's easier to explain because it's formulated in a more CDT-like fashion (whereas Wei Dai's formulations are more EDT-like), and in part it's easier to explain because it builds in less content: accepting FDT doesn't necessarily require a commitme...