Scientific, technical, or other specialized knowledge applied in courts of justice. Courts are finding that some areas of knowledge that have been considered forensic sciences for decades are not based completely on scientific knowledge under contemporary legal and academic standards, but rather are based on technical or other specialized knowledge that must be evaluated under standards not clearly defined. Indeed, some of the most interesting issues facing forensic evidence arise in cases where the defining characteristics of “scientific,”“technical,” and “other” specialized knowledge are at issue.