Comment by AnimalMuppet
2 years ago
Or navel-gazing. In fact, that's one of the classically known flaws. (So well known that it has many names: ivory tower, navel gazing, getting stuck in your own head...)
If you don't compare your thoughts to the outside world, it's easy for them to diverge more and more from reality.
It's important to note that outside world means the actual world, not the thoughts of other humans. You need a way to establish ground truth, which comes from observing the actual outcome of actions and experiments.
you are right, navel-gazing describes it perfectly