What is the Joker's real backstory?

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Tags

1. #causes
2. #interference
3. #killing
4. #batman
5. #support
6. #portraying
7. #story
8. #crime
9. #committing
10. #which
11. #pregnant
12. #built
13. #disfigures
14. #comedian
15. #pressured
16. #joker
17. #failed
18. #origin
19. #chemical