What is a backwards question mark called?

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Tags

1. #primarily
2. #should
3. #scare
4. #punctuation
5. #second
6. #marks
7. #irony
8. #understood
9. #reversed
10. #question
11. #sarcasm
12. #indicate
13. #point
14. #sentence
15. #exclamation
16. #level
17. #sometimes
18. #quotes
19. #express
20. #bracketed