Why do they say Jon Snow knows nothing?

Related questions

1. Who killed Jon Snow's girlfriend?
2. Who did Jon Snow love more?
3. Why does ygritte shoot Jon Snow?
4. Who does khaleesi marry after Drogo?
5. Is Jon in love with Sansa?
6. Who is Sansa in love with?
7. Did Ned Stark come back to life?
8. What does ygritte mean?
9. How did ygritte die Game of Thrones?
10. What did ygritte know?

Tags

1. #south
2. #lordling
3. #thought
4. #doesn
5. #wanted
6. #ygritte
7. #phrase
8. #raiding
9. #symbolizes
10. #initial
11. #anything
12. #savages
13. #uttered
14. #wildlings
15. #naivety
16. #shows