The rule applied in determining the appropriateness of expert opinion testimony is whether the judge would be capable of understanding the complexities of the case.

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The rule applied in determining the appropriateness of expert opinion testimony is whether the expert's testimony is based on sufficient facts or data, reliable principles and methods, and the expert has applied those methods reliably to the facts of the case. It is not simply based on the judge's ability to understand the complexities of the case.

The Rule Applied in Determining the Appropriateness of Expert Opinion