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It strikes me that the amazing/wonderful variety of cognitive processes that we seem to experience are of enormous value.  If a group of early humans had that sort of variety of cognition its prospects for survival would have been greatly enhanced: whatever the challenge, some of them would have the solution.  I’ll go so far as to speculate that the emergence of the aphantasic-to-hyperphantasic spectrum may be why homo sapiens is still around, and homo neanerthalensis isn’t.

It would be interesting to see some research into genetic markers for variants in the spectrum, and to look for those markers in other species.