And forgot to add, everything you mention here has empirical evidence of not being conclusive. Read about acquired savant syndrome (for instance Lythgoe et al 2

And forgot to add, everything you mention here has empirical evidence of not being conclusive. Read about acquired savant syndrome (for instance Lythgoe et al 2005 or Treffert 2006) where severe brain injuries and impairments corresponded to acquired genius-level mathematical abilities, hyper-proficient linguistic or artistic skills, etc.