Logic Symbols

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Across
  1. 4. It means exclusive or -xor.(5 letters)
  2. 6. It mean not-negation with a symbol of x'.(11 letters)
  3. 7. It means 'or' with a symbol of ∨.(13 letters)
  4. 10. It mean negation.(~)
  5. 12. Means 'and' with a symbol of (.)
  6. 13. The symbols is ↔.(10 letters)
  7. 14. The symbol is ¬.(3 letters)
  8. 15. The symbol is ∀.(6 letters)
Down
  1. 1. The symbol is ∴.(9 letters)
  2. 2. The symbol is ⇒.(7 letters)
  3. 3. The symbol is ∵.(7 letters)
  4. 5. The symbol is ∃.(11 letters)
  5. 8. The symbol is !.(mark)
  6. 9. Used also as 'and' with a symbol of.(^)
  7. 11. The symbol &.(9 letters)