Rigoletto's biting humor is lost in the extravaganza, to some extent evaporating that plotline and the reason for the anger of the Duke's toadies.

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Other spinoffs of "The Daily Show" in Afghanistan and Iran, among other places, are adopting not only Stewart's smart and biting humor, but also core American values such as free speech.

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In songs like "Political Science, " "The Great Nations of Europe" and others, he has skewered war, racism and greed in a style that combines biting humor with his unique piano playing.

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