Why is Jon Snow rightful heir to the Iron Throne?

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Tags

1. #succession
2. #after
3. #actually
4. #targaryen
5. #which
6. #aerys
7. #death
8. #means
9. #rightful
10. #traditional
11. #naturally
12. #eldest
13. #lines
14. #throne
15. #would
16. #rhaegar
17. #surviving