 Every once in a while, you run into what could possibly be the most perfect thing ever. In this case, in behavior analysis, we have some amazing, wonderful terms that are clearly defined and clearly written and things like that. Perhaps the best of all of those is errorless learning. It's so perfectly written the term that you might not even think you need a definition. Because the definition of errorless learning would be learning without errors, preventing the learner from making errors. Now there's a whole bunch of procedures that you can use to do that with non-humans or humans alike. However, the thing that you must note is that errorless learning is not about not making errors, it's just about not making very many. In fact, making so few that it would not occur without the sort of procedure that you're using to create the errorless learning scenario. So I would like you to wonder why we've defined it as called it errorless learning then. I just don't know. I just love it though. It's cool.