'''Unitarian''' - religion:

Rather contrarily, Unitarians and Universalists are quite multi-facetted in their views. --OleAndersen
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'''Unitarian''' - math:

A unitarian matrix U is a matrix that satisfies the relation
   *    -1
  U  = U
I don't know if such a matrix has a special way of thinking. I sometimes doubt matrices think at all.

''perhaps they just have to be large enough, to allow emergent thought :)''