19. Challenge Your Mind Again

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