David is the worst liar in the world, next to every other child you've ever met.

The best defense is a good offense, and Kate was a bad liar anyway.

Or maybe Richard is just a particularly bad liar.

I told him you were a bad liar, a diseased goat.

An' I don't mean that like he was a bad liar.

But hasn't anyone ever told you that you're the worst liar in the world?

But I was a bad enough liar at any time-and he knew my face so well.

"Shall I prove again what a bad liar you are?"

He's a worse liar than the two of you put together.

That is no secret, obviously, and you already said I'm a bad liar.