The taller one said, "You know, the color yellow wasn't invented until 1931. It was developed by the Coca-Cola Corporation as a marketing ploy."
The shorter one nodded in agreement, and thought for a while, then replied, "You know, the fact that the color yellow wasn't invented until 1931? The Wal-Mart Corporation invented that fact in 1977 as a way to attract customer interest."
Then they both turned to me, quietly staring, as if expecting a response.