What does Rule 705 of the Federal Rules of Evidence allow experts to do?

Rule 705 of the Federal Rules of Evidence specifically permits expert witnesses to state their opinions and also the reasons that support those opinions. This means that an expert is allowed to present their conclusions based on their expertise, while also providing sufficient rationale for how they reached those conclusions. This is significant in a legal context because it helps the court and the jury understand the basis of the expert's opinion, thereby increasing its credibility and weight in the proceedings.

The rule does not require experts to disclose the underlying facts or data that form the basis of their opinions during direct examination, although they must be prepared to explain these details if asked during cross-examination. This allows for a more streamlined presentation of expert testimony while maintaining the opportunity for thorough scrutiny.