The Self-Sampling Assumption (SSA), the idea that you should reason 
as if you were a random sample form the set of all observers, 
underlies many of the discussions we have had on this list. About 
half a year ago I discovered some paradoxical consequences of this 
assumption. It seems to imply that weird backwards causation and 
psychokinesis(!) is feasible in our world. In this small paper I 
describe these possible counterexamples and discuss whether they 
really are as paradoxical as they appear at first blush:


Nick Bostrom      [EMAIL PROTECTED]
Department of Philosophy, Logic and Scientific Method
London School of Economics

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