Rule 701 Opinion Testimony by Lay Witnesses

Regular witnesses (people who aren't experts) can sometimes give opinions in court, but there are limits on what kind of opinions they can share.

First, the opinion has to come from what the witness actually saw, heard, or experienced firsthand. They can't guess or speculate about things they don't have direct knowledge of. For example, a witness could say someone "seemed drunk" if they saw signs like slurred speech or stumbling, because that's based on what they personally observed.

Second, the opinion needs to actually help explain the witness's testimony or help the judge or jury understand an important fact in the case. If the opinion doesn't add anything useful, it's not allowed.

Third, the witness can't give opinions that require special training or expertise, like medical diagnoses or technical analysis. Those kinds of opinions are reserved for expert witnesses under a different rule. So a regular witness could say a car "was going fast," but they couldn't testify about the exact speed based on skid marks, since that requires specialized accident reconstruction knowledge.