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Author's Note: How Synesthesia Works

I'll just say it: I'm disappointed to be a non-synesthete. But the more I learned about synesthesia, the less "outside" the phenomena I felt. Most of us have a very traditional, dependable relationship with our senses even though we can't ever be sure that, say, I perceive red like you do, or that pad thai tastes the same to both of us. So synesthesia doesn't just show how senses can cross; it shows that perhaps our senses aren't that reliable, period.

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