What are some signs of intelligence?

What are some signs of intelligence?

1. Being able to admit "I don't know".
2. Being able to acknowledge when they're wrong.
3. They tend to be more open to criticism or being shown facts that change their opinions on things.
4. They see both sides of the coin rather than just one side.
5. They acknowledge areas where they lack knowledge.
6. The ability to listen actively ask critical questions on the fly.
7. On the contrary, some intelligent people are distracted listeners.
8. They don't get caught up in unnecessary arguments.
9. And they stop arguing when they realize that someone is desperately dumb.
10. They’re not always typical nerds and show emotional intelligence too.
11. They are often not very obvious.
12. They don’t boast about their knowledge because they’re smart enough to know no one really cares.
13. They never stop questioning everything.
14. They’re good at abstract thinking and is creative.

"The problem with the world is that the intelligent people are full of doubts, while the stupid ones are full of confidence." ~Charles Bukowski