 Sorry, it was the only thing that came to mind, but I can't when I read the term ratio of strain. Oh, sorry. A ratio of strain is a side effect of a particular schedule of reinforcement. So when you're on a fixed ratio of schedule of reinforcement, you have a stepped effect. Sorry. I bought it at 450. I can't do it. Who thought me? I don't know. This could be this fun. All right, so if you're on a fixed ratio of schedule of reinforcement, so you've got this little spot here, which is the accelerating piece, and you have this pause here, and you go up again. So it's a fixed ratio. It's a stepped effect, right? Well, if you require too many responses before they are in their reinforcers, then you end up with a ratio of strain. In other words, you're just not going to do it anymore. You're working hard. You're working hard. It's just not going to happen. You're not going to finish. You're not going to earn that reinforcer. So ratio of strain happens when you thin the schedule too much, right? So if you're on an FR-10, whatever that is, every 10 responses you get reinforced. If you jump from an FR-10 to an FR-100, you're going to produce ratio of strain. In other words, the person's not going to meet the criteria in order to earn the reinforcers. They'll give up. They'll walk away. Okay? So a lot of people, when they take on a big task, they may have learned over time that I can do this task. I can do that task. I can do this. I'll bet I can do this really big thing. Okay? But you don't make it through, right? A great example in my life is from woodworking. I damn near experienced ratio of strain when I was building my cabinets, the first time I went out to build cabinets. Now, I've done a lot of woodwork over the years, but I had never done cabinets. And that was a whole different ball of wax. There was a lot of effort. There was a lot of behaviors that needed to be engaged in in order to produce the reinforcers, which was the completed cabinets. So I almost quit. I almost said F it and I'm going to go hire somebody else. So that would have been probably an example of ratio of strain, not a perfect example because it's not on a particular schedule, but you get the idea. You're asking too much for the reinforcers that are being delivered.