This one is a little long but it's very funny.To bad it couldn't fit in my signature.
Garak:"Why is it no-one ever believes me even when I'm telling the truth ? "
Bashir:"Have you ever heard the story about the boy who cried wolf ? "
Bashir:"It's a children's story about a young shepard boy who gets lonely while attending his flock, so he cries out to the villagers that a wolf is attacking the sheep. The people come running, but of course there's no wolf. He claims that it's run away and the people praise him for his vigilance. "
Garak:"Clever lad! Charming story."
Bashir:"I'm not finished. The next day the boy does it again and the next two and on the fourth day a wolf really comes. The boy cries out to the top of his lungs, but the villagers ignore him and the boy and his flock are gobbled up. "
Garak:"That's a little graphic for children, wouldn't you say? "
Bashir:"But the point is; if you lie all the time nobody's going to believe you, even when you're telling the truth "
Garak:"Are you sure that's the point, doctor? "
Bashir:"Of course. What else could it be? "
Garak:"That you should never tell the same lie twice "
- Garak & Bashir, "Improbable Cause"
Also the one in my signature is funny