What does the exclusionary rule stipulate?

The exclusionary rule is a legal principle that prohibits the use of evidence obtained through violations of a person's constitutional rights, particularly those outlined in the Fourth Amendment, which protects against unreasonable searches and seizures. This rule is aimed at deterring law enforcement from using illegal methods to gather evidence by ensuring that any evidence obtained in violation of these rights cannot be used in court.

When law enforcement officials conduct searches or obtain evidence without the necessary warrant or probable cause, this evidence is considered "tainted." The exclusionary rule serves to maintain the integrity of the judicial system by preventing illegally obtained evidence from influencing the outcomes of trials. As a result, this rule plays a critical role in protecting individual liberties and upholding constitutional protections during legal proceedings.

The other options do not accurately reflect the principles established by the exclusionary rule. For instance, the assertion that all evidence is permissible in court contradicts the very purpose of this rule. Similarly, the requirements regarding victims testifying and the actions of defense lawyers do not pertain to the exclusionary rule itself; rather, they relate to broader procedural aspects of the legal system. Thus, the correct understanding of the exclusionary rule is encapsulated by the stipulation that illegally obtained evidence cannot be used in court.