What does a backwards question mark mean?

Related questions

1. Where do we use question mark?
2. Is a question mark a special character?
3. How do you ask an open ended question?
4. How do you reverse a question mark?
5. Do sentences beginning with I wonder need a question mark?
6. Why is my keyboard typing backwards?
7. What does an upside down question mark mean?
8. What is a interrobang mark?
9. What is a backwards question mark called?
10. Do rhetorical questions require a question mark?

Tags

1. #general
2. #denham
3. #english
4. #originally
5. #question
6. #mirror
7. #backward
8. #briefly
9. #1600s
10. #mirrored
11. #henry
12. #proposed
13. #usage
14. #rhetorical
15. #early
16. #reverse
17. #image
18. #simply