It’s not really a binary D or U, it’s a multidimensional space, and humans classify it based on how much D and U they consider it to have. The problem is it may not be monotonic nor smooth, so gradient descent (this is slightly closer to U, let’s do that and repeat) doesn’t work.
It’s not really a binary D or U, it’s a multidimensional space, and humans classify it based on how much D and U they consider it to have. The problem is it may not be monotonic nor smooth, so gradient descent (this is slightly closer to U, let’s do that and repeat) doesn’t work.