A Martian lands to plunder, pillage, and burn. The Martian goes up to the owner of the first house he sees and says "I'm a Martian just arrived from the other side of the solar system. We're here to destroy your civilization, plunder, pillage, and burn. What do you think of that?"
The owner replies "I cannot express an opinion based on a hearsay evidence, I am a Chartered Accountant"