A man is driving down a deserted country road when he sees a sign that says, "Talking Dog For Sale." Intrigued, he pulls over and knocks on the door.
An old farmer answers. "I'm here about the talking dog," the man says.
"He's out back," the farmer replies, pointing to a kennel.
The man goes to the kennel and sees a scruffy looking mutt. "So, you can talk?" he asks, skeptically.
"Yep," says the dog.
The man's jaw drops. "Amazing! So, what's your story?"
"Well," the dog begins, "I've had quite a life. First, I helped the CIA decode top-secret enemy messages during the Cold War. After that, I worked for NASA, helping them with their calculations for the moon landing. Then, I spent a few years advising the President on foreign policy. But after all that, I just got tired and decided to retire here."
The man is stunned. He rushes back to the farmer. "This is incredible! Why on earth would you sell such an amazing dog?"
The farmer shrugs. "Because he's a damned liar. He never did any of that stuff!"