The better your vocabulary, the more aware you become about possible categorization errors.

Don’t learn a new language. You’ve covered what regular people talk about.5 Instead, dive deep into fields you know nothing about. Economics, Psychology, Philosophy, Physics, or applied rationality.

"Knowing where an idea doesn’t fit can be just as valuable as knowing where it fits."

Beware though. Don’t confuse knowing the name of something with knowing something.

This is what mental models are: ideas from diverse fields that can aid your life. In this sense, improving vocabulary is a meta mental model. It’s a way of finding and organising new mental models.

The better your vocabulary, the more stories you can chunk, the more experiences you can pattern match.

Improve your vocabulary.

The better your vocabulary, the more things you can name, the richer your base of raw materials to hang new ideas and experiences on.

Knowing the name of this idea gives you a scaffolding to hang your mind on. The name triggers the example in your mind.