Proof of Required Mental State is a legal concept where a person's mental state is used as evidence in a criminal trial to establish their intent or state of knowledge. This type of evidence is used to prove a defendant's guilt or innocence and to determine what sentence they should receive. It can be used to show that an accused person had the intent to commit a crime or to prove that they did not have the mental capacity to understand their actions. There are two types of Proof of Required Mental State: subjective proof and objective proof. Subjective proof is based on the defendant's own statements, testimony, and other evidence that establishes their mental state. This type of proof requires the court to evaluate the defendant's mental state by considering their knowledge, intention, understanding, and other factors. Objective proof is based on external evidence, such as physical evidence, expert testimony, and other objective sources. This type of proof requires the court to consider objective evidence to determine the accused's mental state.