A man walking around his neighborhood sees a sign that reads, "talking dog for sale." The man thinks, "This cannot be possible." So he approaches and knocks on the door. Another man answers and says,
"Hi, can I help you?"
"Hi, I noticed the sign over there and..."
"Oh, you're interested in the talking dog? Just take the side gate, he's around back."
The man decides to go around through the gate to the back yard, and sure enough there is a dog sitting there. "Are you really a talking dog?" asks the man.
"Why yes I am" replies the dog.
In utter amazement, the man says, "wow this is incredible, could you tell me about yourself?"
The dog replies, "Certainly; at a young age I realized I had special talents and abilities, and being the patriot that I am decided to offer my services by joining the military. It wasn't long before I was approached by and recruited to the CIA where I was used to infiltrate and gather vital intelligence from terrorists around the world."
"Wow that's incredible" says the man, who quickly runs back to the door to speak with the owner again. "How much for the dog?" he asks.
"Hmmmmmmmmmmm........ten bucks" says the owner.
Even more amazed the man asks, "How could sell such an incredible dog with such a history for ten bucks???"
The owner laughs and says, "That dog is a habitual liar, he's never been out of the back yard!!"