What type of evidence is not directly based on firsthand knowledge?

Circumstantial evidence is characterized by information that implies a fact but does not directly prove it through firsthand observation. This type of evidence relies on inference and can lead to conclusions based on the surrounding circumstances rather than direct proof. For example, if a person was seen at the scene of a crime and later found to have no alibi, that person's presence can suggest involvement, but it does not confirm it outright.

Direct evidence, on the other hand, is based on firsthand knowledge, such as eyewitness testimony or a confession. Best evidence refers to the original documents or recordings that provide unquestionable proof of a fact. Second best evidence usually encompasses copies or secondary documents that can be used when the original is not available, but it still does not qualify as circumstantial.

Understanding these distinctions is crucial in legal contexts, as the strength and admissibility of evidence can significantly impact the outcomes of cases.