"Like a house built on sand, the expert's opinion is no better than the facts upon which it is based." This famous line from Kennemur v. State of California, 133 Cal. App. 3d 907, 924 (1982), can be found in virtually every California motion to exclude an opponent's expert witness. And it is typically cited for one of two arguments:
There is the junk science argument. This argument seeks to show the expert's reasoning or methodology is unreliable. It is used against the expert...
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