F. Logic

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123456789101112131415
Across
  1. 3. ^
  2. 5. X'
  3. 9. +
  4. 10. |
  5. 11. the pattern of digits under the bar repeats without end
  6. 12. and
  7. 13. ¬
  8. 15. ~
Down
  1. 1. ∵
  2. 2. ∴
  3. 4. v
  4. 6. ⇒
  5. 7. if and only if (Iff)
  6. 8. not-negation
  7. 14. ⊕