Before revision: Bostrom has suggested refining SSA to what he calls the Strong Self-Sampling Assumption (SSSA), which replaces "observers" in the SSA definition by "observer-moments".
After revision: , in his book Anthropic Bias: Observation Selection Effects in Science and Philosophy,Bostrom has suggested refining SSA to what he calls the Strong Self-Sampling Assumption (SSSA), which replaces "observers" in the SSA definition by "observer-moments".