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Jika seorang ilmuwan tua tetapi terhormat mengatakan bahwa sesuatu itu mungkin, dia hampir pasti benar; tetapi jika dia mengatakan bahwa itu tidak mungkin, dia sangat mungkin salah. Asli: If an elderly but distinguished scientist says that something is possible, he is almost certainly right; but if he says that it is impossible, he is very probably wrong.