27-year-old Void City resident Mateo Miller was born with SHAD—Synaesthetic Hyper Attention Disorder. On the positive side, his condition allows Mat to engage multiple parts of his brain at once. For example, he is able to have meaningful participation in several conversations at once while also doing a crossword puzzle and following the plot of a television drama. This doesn’t mean he is smarter than others—he does any activity with the average aptitude—but he is able to mentally cycle through everyday activities simultaneously.
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