Can we predict the future?

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Across
  1. 2. an occurence, event
  2. 3. branch of physics
  3. 4. principle, belief
  4. 5. uninterrupted
  5. 6. playful, fanciful
  6. 8. come to light
  7. 9. random
  8. 12. at the same time
  9. 14. ingrained, deep-rooted
  10. 15. calculation
  11. 17. fundamental
  12. 18. contrariwise
  13. 19. not staying the same throughout
Down
  1. 1. to subvide
  2. 2. forerunner
  3. 7. fictitious
  4. 10. distinct, individual separate
  5. 11. inference
  6. 13. in space, astronomical
  7. 16. clearly distinguishable limits