 Round three, folks, intermittent schedules, round three. You would think that such a term would be actually easy to define. It is easy to define, but it's hard to talk about with humor and accuracy and anything else. I keep slipping up and saying words slightly wrong. So let's try this again. It is anything, it is any schedule of reinforcement. It is not a continuous schedule of reinforcement. In other words, behavior happens maybe once, twice, three, four times, whatever, and then a reinforcer is delivered. That could be your fixed ratio. You could have a variable ratio, which on average four responses is going to get reinforced. You could even put intervals with it where the behavior is going to happen, but it only gets reinforced after one particular amount of interval has passed. You can have all sorts of those things, but the whole point is, is that an intermittent schedule actually produces behavior that's more resistant to extinction, and there's lots of different types of intermittent schedules that we can get into. However, the ones that we would typically focus on are the FRs, the VRs, the FIs, and the VIs, you know, those sorts of things, but there's lots of other ones that you can deal with. Intermittent, we're not going to reinforce every single behavior. That's all there is to it.