Sometime ago, a scientist -- let's call him Prof. X -- was chosen for the directorship of a premier institution. Since he was rather unknown at that time, this announcement generated quite a stir -- especially among those outside his field.
People were itching to know more about Prof. X, his scientific credentials, his claim to fame. They approached a colleague who works in the same field as Prof. X.
"What is Prof. X like?", they asked their colleague. "Tell us, is he a good scientist?"
"I don't know if he is a good scientist," said the colleague. After a short pause, he added, "But he's now a great scientist!"