There's an old Zen maxim that says 'Unask the question; it is illelevant'. Ph. Ds span the range of idiots (not even savant ones) to very knowledgable geniuses in their feild. Sometimes when they go outside their field of expertize they fall flat on their faces {I'm a Ph. D. expert in a narrow field, which counts for nothing here or elsewhere outside that field, and few of my friends know that I'm have Ph.D., with postdoctoral work under President Kennedy's science advisor, who was in Washington, DC, while I was his post-doc )
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