Is The Opinion “Lay” or “Expert?” — The Superior Court Has An Opinion (Maybe A Wrong One)
Temple University Beasley School of Law - Advocacy
JUNE 2, 2024
To ensure there is a foundation for the opinion rather than mere speculation, there is the testing device of cross-examination. But lay witnesses may not cross a line and give testimony that is “based on scientific, technical, or other specialized knowledge within the scope of Rule 702.” The line is ill-defined.
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