Direct evidence is clear evidence of a fact, happening or thing that requires no additional thought to prove its existence, as opposed to circumstantial evidence. Direct evidence may consist of a witness' testimony who saw acts done or heard words spoken that relate directly to an issue in dispute. It is not introduced for the purpose of having inferences drawn from it, but rather is to be considered on its face. However, it may be said that all types of evidence are dependent on circumstances for its credibility. In general, direct evidence is classified as evidence which is more forceful than indirect evidence because it requires no inferences or leaps of logic to reach a conclusion.