A policeman walks by a street vendor.

Policeman, “What are you selling?”

Vendor, “Apple seeds. 5 dollars a pop!”

Policeman, “What? Why would anyone want to eat apple seed?”

Vendor, “They make you smarter!”

Policeman, “OK, give me one (swallows it)… wait a minute? For 5 dollars I could have bought a pound of apples and got myself at least 20 seeds!”

Vendor, “See!!! You’re smarter already!”

Policeman, “Wow, you’re right… Give me two more, quickly!”