Aku and Jack in “Unfinished Business”

Aku

Say goodbye to your little toy, Jack! [starts bending his sword] Once and for- [the sword turns to dust] Huh? A fake!

That's right, Aku! You see, I'm smart, and you are pure evil...and I knew you would cheat. So I had a fake sword made and hid it under that rock over there. Then I hid the real sword right down... [notices the sword is gone, then looks up to find another minion holding it] here.

Aku

You see, Jack, I knew that you knew I would cheat, so I came prepared. And now you will learn what it means to be a fool!

I am afraid that you are the fool, Aku.

Aku

Why?

Because I knew that you knew that I knew that you knew that I knew you would cheat so I hid fake swords all over this place.