You see this a lot in machine learning. Reward a neural network or evolutionary algorithm for identifying squirrels vs. cats and you'll get one that compares on

You see this a lot in machine learning. Reward a neural network or evolutionary algorithm for identifying squirrels vs. cats and you'll get one that compares one pixel of the usually beige wall color in mostly indoor shots of cats vs. the non-beige pixel found in mostly outdoor shots of squirrels.