 Here's the last one. It's backward conditioning and it's not the type of backward conditioning that you're probably thinking about. That's not what we're talking about and we're not talking about backward conditioning like this. Notice I did not try to do a moonwalk. So we are not talking about backward conditioning in that sense. We're talking about flipping everything around and doing it backward, which would be where you present the U.S. than the C.S. and not the C.S. than the U.S. So if you'd like some clarity, play the video backwards and you'll understand. No, don't. That's never a good idea with how quickly I speak. Who knows what's going to be said when portals are open. So anyway, backward conditioning, let's get back to the reality of it. We're going to turn the U.S. on and then we're going to turn it off and then we're going to turn the C.S. on and turn it off. I shouldn't be touching that. We're going to turn the U.S. on and then we're going to turn the N.O. off and then we're going to turn the C.S. on. So it's backward because we're putting that U.S. first, which means we're not going to get any predictability between the C.S. and the U.S. But there's an irony here. If you do it enough, you might get some conditioning. Why? Because if you keep doing trial after trial after trial after trial, eventually you're going to go, remember you got your U.S. on and then your C.S. is on. But take a look at this. U.S. C.S., U.S. C.S., U.S.C. Wait a minute. That C.S. there is actually predicting that U.S. there. So if you do them enough and you pack them close together, you might get conditioning, but you're not really getting backward conditioning. You're just getting trace conditioning because you screwed up your procedure. So don't do that and don't think that, hey, I'm magical. I got backward conditioning. No, you just got trace conditioning. Sorry, folks. So anyway, here you go. Have a good day. I'm not supposed to say that anymore, but you reinforced me for it a moment ago. So anyway, I don't know, go out, go forth and classically condition reinforcers so you can be ethical. Perfect.