 non-contingent. Oh, I hate saying non-contingent reinforcers. That was kind of funny. He was trying to reinforce me, but that one wasn't non-contingent. So anyway, non-contingent reinforcement reversal technique is where we're going to use the NCR, the non-contingent reinforcement condition as the baseline, right? So we're just going to start delivering reinforcers on a fixed interval or a fixed time schedule. Just throw this stimulus out there that is reinforcing to the organism. But we're not really going to give a hoot about what they're doing. And then we're going to switch to a different condition, and I'm just trying to reduce my behavior by doing NCRs. And then we're going to switch to a different condition in which we're going to make reinforcement contingent, right? So A is non-contingent reinforcement. B is contingent reinforcement. Go back to non-contingent reinforcement. Go back to contingent reinforcement. You get the idea. What we're going to be able to test is the effects of non-condition reinforcement relative to condition reinforcement. So what you'll see based on the research is that the non-contingent reinforcement condition, wow that's a mouthful, produces lower rates of responding than does the contingent reinforcement. It's these basic designs that led us to understand that reinforcement has to be contingent upon a response in order for it to increase the response. There you go.