Robert instantly saw the flaws in any idea almost as soon as he had conceived it. Whereas some physicists—Edward Teller immediately comes to mind—boldly and optimistically promoted all of their new ideas, regardless of their flaws, Oppenheimer’s rigorous critical faculties made him profoundly skeptical. “Oppie was always pessimistic about all the ideas,” recalled Serber. Turned on himself, his brilliance denied him the dogged conviction that is sometimes necessary for pursuing and developing original theoretical insights. Instead, his skepticism invariably propelled him on to the next
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