 .
This means that e does not selectively favour any of the hypotheses hj that implies that some observer-moment is compatible with e.
Since this consequence is unacceptable, we must reject  . Any workable reference class definition must permit reference classes to contain observer-moments that are subjectively distinguishable. The reference class definition is in this sense non-trivial.
Observer-moments that are incompatible with e can thus play a role in determining the credence of observer-moments whose total evidence is e. This point is important. To emphasize it, we will give another example (see figure 8):
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