© D.L. Crumbley
Federal Rule of Evidence 803(18) permits the introduction of relevant material from written sources to get around the hearsay rule.
The opposing attorney can get the expert to “concede the existence of reliable authorities in the field” that later may be used at trial to help their side.
Federal Rule of Evidence 803(18)
Source: D.M. Malone and P.J. Zwier, Effective Expert Testimony, Notre Dame, IN: NITA, 2000, p. 73.