Flowers for Algernon

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Across
  1. 2. loss of function
  2. 4. expertise in an area
  3. 7. becoming weak
  4. 9. not clearly seen
Down
  1. 1. the science of mind and behavior
  2. 3. stable condition
  3. 5. being in an weakened state
  4. 6. group agreement
  5. 8. something real