As You Wish

Vizzini:  “You’ve beaten my giant, which means you’re exceptionally strong. So, you could have put the poison in your own goblet, trusting in your strength to save you. So I can clearly not choose the wine in front of you. But, you’ve also bested my Spaniard which means you must have studied. And in studying, you must have learned that man is mortal so you would have put the poison as far from yourself as possible, so I can clearly not choose the wine in front of me…”
Man in Black: “You’re trying to trick me into giving away something.  It won’t work.”
Vizzini:  “It has worked, you’ve given everything away.  I know where the poison is!”
Man in Black:  “Then make your choice.”
Vizzini:   “I will.  And I choose…  What in the world can that be…. ?”