Logic Symbols

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Across
  1. 3. x'
  2. 7. x
  3. 8. not - negation
  4. 9. .
  5. 10. |
  6. 11. ∃
  7. 14. negation
  8. 15. +
Down
  1. 1. ∵
  2. 2. &
  3. 4. and
  4. 5. exclusive or - xor
  5. 6. ¬
  6. 8. if and only if (iff)
  7. 12. ⇒
  8. 13. ∴