[ComradePhil]

I personally believe it's more varied than ever (simply because there has never been a time when there was more interaction between very different people and ideas)... but as we get old, our mental models get more and more outdated. It can see more variation if you give the data it has been trained with but fewer variation when it comes to new unfamilar data (everything new seems more similar to each other just by being different from what we know).