EXPERT TESTIMONY; EVALUATION BY JURY OF ANSWER TO HYPOTHETICAL QUESTION
A question has been asked in which an expert witness was told to assume that certain facts were true and to give an opinion based upon that assumption. This is called a hypothetical question. If any fact assumed in the question has not been established by the evidence, you should determine the effect of that omission upon the value of the opinion.
NEV. J.I. 2.12