spiral problem here which is often kind of used to to show properties and neural networks what you have are blue points and the blue points on our one class and the red points are another class you see the two classes here are in this kind of spiral pattern it's just the data space is just two-dimensional so you see here this is one class this is the other class this is pretty difficult for a model to learn because of course the easy models would be like linear classifiers but there's no way to like put a line through this such that one