TODAY, IN HIS first speech to his staff at the Department of Housing and Urban Development, newly minted Secretary Ben Carson delivered an extemporaneous disquisition on the unparalleled marvel that is the human brain and memory. “There is nothing in this universe that even begins to compare with the human brain and what it is capable of,” he began. “Billions and billions of neurons, hundreds of billions of interconnections.” It was a tangent in a speech about how in America, anything is possible.