What is a word for someone who doesn't understand?

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Tags

1. #could
2. #certain
3. #person
4. #doesn
5. #longer
6. #needs
7. #understand
8. #explanation
9. #inquisitive
10. #extra
11. #takes
12. #every
13. #definitely
14. #accept
15. #tries
16. #things
17. #describe