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oracknows | November 6, 2015As a surgeon, I find Ben Carson particularly troubling. By pretty most reports, he was a skilled neurosurgeon who practiced for three decades, rising to the chief of neurosurgery at Johns Hopkins. Yet, when he ventures out of the field of neurosurgery—even out of his own medical specialty—he routinely lays down some of the dumbest howlers I've ever heard. For example, he denies evolution, but, even worse, he's been a shill for a dubious supplement company, Mannatech. Worse still, when called out for his relationship with Mannatech in the last Republican debate, Carson lied through his teeth…