As a criminal defense attorney, I create reasonable doubt as to my client's guilt in the eyes of the judge or jury.
Yes, I like John Wayne.
I like Ellington, too.
But the name is also that of a cute character from television advertisements for Burger King in the early 1980s. The Duke of Doubt, in short, did not care for Burger King. He expressed doubt that Burger King's food was either delicious or nutritious. ("I doubt that. I doubt that, too.") I do not care for Burger King, either. Metropolitan plc, the British parent company of Burger King, bought Smith & Wesson in the late 1980s and nearly destroyed the company by entering it into suicidal settlements with HUD and other governmental entities in the late 1990s. A boycott dropped their sales by half, the company was on the verge of failure, and a group of pro-gun investors bought it for a song, pulled out of the deals, and saved the firm.
I AM the Duke of Doubt.