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Most science fiction novels published this year feature interstellar travel. All novels that feature interstellar travel also include descriptions of advanced robotics. No novel that includes descriptions of advanced robotics was written by a first-time author.

If these statements are true, which one of the following must also be true?

  1. A majority of this year's science fiction novels were not written by first-time authors.
  2. Some first-time authors wrote novels featuring interstellar travel this year.
  3. Every science fiction novel published this year includes descriptions of advanced robotics.
  4. Descriptions of advanced robotics appear only in this year's science fiction novels.
  5. Most novels that include descriptions of advanced robotics feature interstellar travel.

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