There is a fire in a 12 storey building. A man panics and jumps out of the window. How does he survive?
He jumped from a first floor window.
Jack tells Jill, "This isn't the $5 bill you left on the the table. I found it between pages 15 and 16 of Harry Potter."
Jill retorts, "You're lying and I can prove it." How did Jill know?