observed picture is a dog or cat so we can for example look at the snout length or the ear geometry if we assume that dogs generally have longer snouts and gets have much more pointy ear shapes so how would we decide where to draw our decision boundary well we can draw it over here or here or like this any of these would be fine but what would be the best if you do not have the optimal decision boundary we could incorrectly classify a dog with a cat so if we draw an arbitrary separation line and we use intuition to draw it somewhere between