Squigly Squigly's Brain Teasers

Question:

What are four things that have an "eye" but cannot see?

Answer:

A needle, a potato, the alphabet and a hurricane.

Try another Brain Teaser:

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?