Holding that expert testimony was inadmissible based on its unreliable methodology notwithstanding "the impressive qualifications of plaintiffs' experts"
Holding "there is no basis for excluding evidence of biased personnel management actions so long as that evidence is relevant to prove the communication of a hostile message"
Holding that where design defect case alleging that defendant's cigarettes were defective was tried under a risk-benefit theory, plaintiff was required to offer competent expert testimony to establish that smoking the defendant's cigarettes was the actual cause of the lung cancer that killed the plaintiff