George Bernard Shaw - Irish playwright, critic, political activist (1856 - 1950) - Nobel Prize for Literature in 1925.
Shaw wrote in his play, "Major Barbara" - "He knows nothing; and he thinks he knows everything. That points clearly to a political career."
How many times has this been the gist of the discussion by political party leadership when selecting their candidates for high office?
I don't know the answer, but the examples are there for all to see!