Notes on Think Again, by Adam Grant. 
## Chapter 3
### Main idea
- People build more developed belief systems and improve if they are willing to challenge their beliefs.
- It's unhealthy to hold beliefs and defend them so aggressively
- Being wrong and recognizing that is healthy
- Recognize when a reaction is emotional, and a defense of the ego, rather than intellectual, and a defense of the idea.
- Do not base a personality around ideas, base it around broad, positive values. To