“I guess my tendency is to think essentially that the new wrinkles won't do the job if the old major idea didn't, and so you have to try something different. Then maybe they can all be combined in some coherent piece.”
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Examples one finds in the philosophical literature are somebody who's seen the trial of a child of theirs, where they're being proved guilty of some crime that would drive the parent into a depression, maybe a suicidal depression.
Robert Nozick 
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Evolutionary cosmology formulates theories in which a universe is capable of giving rise to and generating future universes out of itself, within black holes or whatever.
Robert Nozick
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