Music

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Across
  1. 2. Something that exists or is simulated by computer software
  2. 3. Having the ability or skill to do something
  3. 5. To take something for granted without proof; to suppose or presuppose.
  4. 6. a written work, especially in music or literature
Down
  1. 1. To establish the truth or validity of something through evidence or argument.
  2. 4. earlier
  3. 7. Something that is average, common
  4. 8. the immaterial essence of a person