Revised stem
At a federal civil trial for professional malpractice, Peter claimed that Martha, an electrical engineer, had negligently specified undersized motors for the rotating Bethlehem-star display at Peter's private Nativity-themed mini-golf course. Peter called Daniel, an expert in stage machinery. Daniel based his opinion solely on his own professional experience, but when asked, he also said that Lydia's Handbook of Sacred Stage Motors was a reliable authority in the field and consistent with his views. On cross-examination, Martha's lawyer asked Daniel whether he and Lydia were ever wrong. Daniel answered, "Only the Lord is perfect." The lawyer asked no further questions. Martha later called Hannah, her own expert, and asked whether she accepted Lydia's handbook as reliable. Hannah answered that it once was, but it is now badly out of date. Peter requested that the jury be allowed to examine the handbook and judge for itself the handbook's reliability. Should the court allow the jury to examine the handbook?