challenged quotes

The charge that an idea is radical, impractical, or long- haired is met by showing that a prominent businessman has favored it†an additional tactic in this strategy of defense†is to assert that Winston Churchill once sponsored the particular idea. If one is challenged, a sufficiently careful investigation will show that he did.

-John Kenneth Galbraith
  Economics and the Art of Controversy.

The mythical America†that marvellous, heroic, sentimental landwas an object of faith. It challenged you to make the believer's leap over the rude facts at your feet.

-Jonathan Raban
  Hunting Mister Heartbreak, ch.2.