There might be two if you picked right, but none of them have the prize. And then they will show it to you. And so let's say that they show you curtain number three, and so curtain number three has the goat. And then they will ask you, do you want to switch to curtain number two? And the question here is, does it make a difference? Are you better off holding fast, sticking to your guns, staying with the original guess? Are you better off switching to whatever curtain is left?