notsonewuser comments on Timeless Decision Theory and Meta-Circular Decision Theory - Less Wrong
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Quick stupid question: what does "A[]->O" stand for? specifically "[]->"? Is that a material implication? Should I read it as "P(O|A is the output of this computation and rest of universe)"?
(edit): could someone please help with this?
It means "If A were true, then O would be true." Note that this is a counterfactual statement.