What is this decision theory? I haven't read the Sequences yet, sorry.
That's not the kind of question to be answered in a paragraph. But the label for Eliezers theory is Timeless Decision Theory (TDT).
How exactly does it make it 'irrelevant?' I haven't been able to find a single reference to the DA.
A self-modifying AI is built to serve humanity. The builders know, of course, that this is much riskier than it seems, because its success would render their own observations extremely rare. To solve the problem, they direct the AI to create billions of simulated humanities in the hope that this will serve as a Schelling point to them, and make their own universe almost certainly simulated.
Plausible?