Why is it called scratch paper?

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Tags

1. #potential
2. #misconstrued
3. #would
4. #paper
5. #motivation
6. #describes
7. #eggcorn
8. #cheap
9. #makes
10. #sense
11. #scratch
12. #rather
13. #coined
14. #linguists
15. #reshaped
16. #semantic
17. #taker
18. #phrase
19. #writing
20. #source
21. #hurried