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Continue to ChatIt's not even known how many kinds of cells there are in the brain. If you were looking for a periodic table of the brain, there is no such thing. I really like to think of the brain as a computer. - Edward Boyden from https://whatsmyquote.com/quote/it-s-not-even-known-how-many-kinds-of-cells-there-are-in-the-brain-if-you-were-looking-for-a-periodic-table-of