CHALLENGE YOUR MIND

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Across
  1. 2. Symbol for a value
  2. 8. Mathematical statement
  3. 9. Step by step procedure
  4. 10. Different arrangement
  5. 13. Logical conclusion
  6. 14. Reasoning from examples
  7. 15. Arrangement of numbers
Down
  1. 1. Encrypted message
  2. 3. Accepted principle
  3. 4. Statement assumed true
  4. 5. Measure of slope
  5. 6. Seemingly self contradictory
  6. 7. Unproven idea
  7. 11. Evidence for truth
  8. 12. Relation between inputs and outputs