Why did Aizen lose to Ichigo?

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Tags

1. #survived
2. #completed
3. #defeat
4. #stepped
5. #vulnerable
6. #attack
7. #ichigo
8. #however
9. #allowed
10. #transformation
11. #aizen
12. #sealed
13. #strongest
14. #could
15. #state
16. #would
17. #urahara
18. #temporarily