Origin of intelligence

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Across
  1. 3. Facts, statistics, numerical data, quotations, specific examples and expert opinions that support a claim
  2. 6. to infer from something knownLikes to chase mice
  3. 8. Easily changed
  4. 9. to cover or fill completey
Down
  1. 1. To describe precisely
  2. 2. to contradict
  3. 4. Originating naturally
  4. 5. traits inherited from birth
  5. 7. A coherent series of reasons, statements or facts intended to support or establish a point of view