Logic Symbols

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Across
  1. 4. !
  2. 8. |
  3. 11. &
  4. 13. °•°
  5. 14. exclusive or xor
  6. 15. =>
Down
  1. 1. x’
  2. 2. not-negation
  3. 3. •°•
  4. 5. ^
  5. 6. V
  6. 7. ~
  7. 9. if and only if(iff)
  8. 10.
  9. 12. +