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Old 03-27-2017, 05:09 PM
hibernicus hibernicus is offline
Charter Member
Join Date: Oct 2000
Location: Dublin, Ireland
Posts: 2,236
I think the word I was thinking of may have been "factualist", which doesn't correspond at all well to the description in my OP, so I owe you all an apology for wasting your time.

I really appreciate the excellent suggestions, all of which shed light on the phenomenon. The idea that this is an autistic trait is especially interesting.