2 Mexicans
A Border Patrol agent is on duty. He spots two Mexicans and runs them down. They show him their papers (he thinks they are phony).

He tells them, "O.K. I have a test for you. I want you to use the words 'cheese' and 'liver' in a sentence."

So, the first guy says, "I made a liver and cheese sandwich for lunch."

The agent says, "That was good, you can go. What about you?" he asks the second guy.

He says, "Liver alone. Cheese mine."

1stPerson: "Do you know anything about...
1st Person: "Do you know anything about this fax-machine?"
2nd Person:"A little. Whats wrong?"
1st Person: "Well, I sent a fax, and the recipient called back to say all she received was a cover-sheet and a blank page. I tried it again, and the same thing happened."
2nd Person: "How did you load the sheet?"
1st Person: "Its a pretty sensitive memo, and I didn't want anyone else to read it by accident, so I folded it so only the recipient could open it and read it."