The Gentle Mind Game (Difficult Level)

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Across
  1. 3. Complex puzzle
  2. 4. Logical reasoning
  3. 6. Cryptic question
  4. 8. Difficult choice
  5. 10. Cause confusion
  6. 11. Self-evident truth
  7. 13. Contradictory truth
  8. 14. Complex maze
Down
  1. 1. Mental calmness
  2. 2. Reflect carefully
  3. 5. General principle
  4. 7. Mysterious situation
  5. 9. Think deeply
  6. 10. Assume as true
  7. 12. Comparison concept