Law » Courts » Evidence » Admissibility of evidence » Expert and scientific evidence » Must expert evidence be generally acceptable to experts or must the trial court make an independent assessment of the validity and reliability of such evidence? » Trial court must act as gatekeeper and make independent assessment » The expert or scientific evidence must be shown to be reliable » Reliability or unreliability of assorted fields and methods » Biological & life sciences » "Scientific" lie detection » Are polygraph test results unreliable and inadmissible? » Inadmissible: Polygraph test results...