With a one-page c.v., for example, one could legitimately interrogate for a couple days at least, barring total exhaustion of judicial patience. Please explain each one and its use. Your honor, I move that this witness be dismissed as having irrelevant qualifications, based on his own testimony just now. Explore each book, article or author he has read in his field, along with every class, conference or meeting of any kind he ever attended. Particularly, ask of each whether it is an authority relied on in this case.
Authoritative authors are gold mines of impeachment.
He would likely not qualify under either a Frye or a Daubert type of test for admissibility of scientific testimony. Have the expert define every technical term employed, plus every technical or obscure term used in the definition. That phrase simply begs for a two-hour exploration of what the three terms mean and how they are ascertained in this specific instance. Let me help you out. Explore thoroughly each published study the expert mentions.