( August 14, 2025, 2:39 PM EDT) -- SHERMAN, Texas — A neuropsychologist who opines that a man’s cognitive and neurological impairments were, at least in part, caused by his use of marijuana and not solely the result of wearing an allegedly defectively designed motorcycle helmet during an accident can testify after a Texas federal judge rejected the man’s efforts to bar her testimony under Federal Rules of Evidence 702 and 403....