What term refers to anything offered in court to prove the truth or falsity of a fact in issue?

The term that refers to anything offered in court to prove the truth or falsity of a fact in issue is "evidence." Evidence encompasses a broad range of materials, including physical objects, documents, witness statements, and more, that are presented to the court to establish the validity of a claim or defense. It serves as the foundation for the judicial process, allowing the judge or jury to make informed decisions based on the information presented.

Testimony, while a form of evidence provided by witnesses, is just one part of the larger category of evidence. An affidavit is a written statement confirmed by oath, used as evidence; however, it is also a specific type of evidence. An exhibit refers to tangible items submitted as part of the evidence in a trial but does not encompass the entirety of what can be considered evidence. Thus, evidence is the most comprehensive term applicable to what is presented in court to establish facts.