Logic Symbols

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Across
  1. 3. an upside-down letter A that means for all
  2. 5. a V-shape symbol that means "or"
  3. 9. an arrow pointing to the right
  4. 10. not-negation
  5. 13. it indicates "or" in math
  6. 15. exclusive
Down
  1. 1. three dots shaped into V,usually use for reasoning
  2. 2. negation
  3. 4. a period or dot
  4. 6. if and only if
  5. 7. usually used in sentence to indicate strong feelings and math it means not-negation
  6. 8. used to indicate "and" in math
  7. 11. three dots that forms a triangle, usually used for conclusion
  8. 12. a t sign that indicates "or"
  9. 14. an reversed "E"