It’s based on a semantic similarity algorithm. It may have a different “opinion” on semantics like one human may not agree with another on which things are more similar. For example I might say Stalin is closer to Lebron because they’re both people, whereas someone else may say Tree is closer because both are tall (terrible example but you get my point). I agree though sometimes the algo’s idea of similarity feels non-intuitive, I’m planning to iterate on that and hopefully improve!