golden rule argument

Definition from Nolo’s Plain-English Law Dictionary

During a jury trial, an attempt to persuade the jurors to put themselves in the place of the victim or the injured person and deliver the verdict that they would wish to receive if they were in that person's position. For example, if the plaintiff in a personal injury case has suffered severe scarring, the plaintiff's lawyer might ask the jury to come back with the verdict they themselves would want to receive had they been disfigured in such a manner. As a rule, judges frown upon this type of argument, because jurors are supposed to consider the facts of a case in an objective manner.

Definition provided by Nolo’s Plain-English Law Dictionary.