Cobb: "What do you want?"
Saito: "Inception. Is it possible?"
Arthur: "Of course not."
Saito: "If you can steal an idea, why can't you plant one there instead?"
Arthur: "Okay, this is me, planting an idea in your mind. I say: don't think about elephants. What are you thinking about?"
Saito: "Elephants?"
Arthur: "Right, but it's not your idea. The dreamer can always remember the genesis of the idea. True inspiration is impossible to fake."
Cobb: "No, it's not."