2017 Case Summaries Substantial-factor test analyzed in medical malpractice case Employer-employee duty balanced against foreseeability Court: Lease did not violate the rule against perpetuities when multiple plausible interpretations exist Supreme Court clarifies defamation standard Wikipedia not a reliable source, SCOTX holds Careful drafting imperative in mineral-deed jurisprudence SCOTX denies opportunity to recognize tortious interference with inheritance SCOTX clarifies acceptance-of-benefits doctrine