Wikipedia Signpost II

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Across
  1. 4. [Insert numeral here]
  2. 7. One who has the power to turn back to what was before
  3. 10. Graffiti, with less artistic merit
  4. 13. In fashion, traditionally paired with an eye
  5. 14. Paired with a knife
  6. 16. Impossible! Perhaps these are incomplete
  7. 18. The conclusion is obvious
  8. 19. Message on a fez
  9. 20. Seeking support elsewhere
Down
  1. 1. Imitation is the sincerest form of internet flattery
  2. 2. Philosophy of retention
  3. 3. Sysadmin
  4. 5. Pb
  5. 6. The highest honor an article can receive
  6. 8. Numismatic forum
  7. 9. A blog of change
  8. 11. An insignificant change
  9. 12. The holy grail of argument
  10. 15. Whitespace creation
  11. 17. Only here for one reason
  12. 21. American Football Conference