Yet it seems as though no-one thought to explore the space beyond these two decision theories until Eliezer proposed TDT...
This is simply not true. Robert Nozick (who introduced Newcomb’s problem to philosophers) compared/contrasted EDT and CDT at least as far back as 1993. Even back then, he noted their inadequacy on several decision-theoretic problems and proposed some alternatives.
Me being ignorant of something seemed like a likely part of the explanation—thanks :) I take it you’re referencing “The Nature of Rationality”? Not read that I’m afraid. If you can spare the time I’d be interested to know what he proposes -thanks!
I haven’t read The Nature of Rationality in quite a long time, so I won’t be of much help. For a very simple and short introduction to Nozick’s work on decision theory, you should read this (PDF).
This is simply not true. Robert Nozick (who introduced Newcomb’s problem to philosophers) compared/contrasted EDT and CDT at least as far back as 1993. Even back then, he noted their inadequacy on several decision-theoretic problems and proposed some alternatives.
Me being ignorant of something seemed like a likely part of the explanation—thanks :) I take it you’re referencing “The Nature of Rationality”? Not read that I’m afraid. If you can spare the time I’d be interested to know what he proposes -thanks!
I haven’t read The Nature of Rationality in quite a long time, so I won’t be of much help. For a very simple and short introduction to Nozick’s work on decision theory, you should read this (PDF).