Logic symbols

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Across
  1. 1. -
  2. 4. not negation
  3. 5. •
  4. 8. or
  5. 10. &
  6. 12. single quote
  7. 13. +
Down
  1. 2. !
  2. 3. /
  3. 6. |
  4. 7. ^
  5. 9. if and only if (iff)
  6. 11. exclusive or xor