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At a federal trial, Hannah is suing Barnabas, director of Grace Wings, a Christian nonprofit that uses small aircraft for short-term mission trips and medical supply deliveries to remote villages. Hannah alleges that Barnabas owned or was responsible for a small plane that crashed, injuring her during a Scripture airlift flight, because he negligently failed to have it properly maintained. Barnabas has asserted in defense that he never owned the plane or had any responsibility to maintain it. At trial, Hannah calls a witness to testify that the witness had sold to Barnabas a liability insurance policy on the plane. The testimony of the witness is