In 1960, the Supreme Court of the United States in Dusky v. United States established the standard for federal courts, ruling that “the test must be whether the defendant has sufficient present ability to consult with his attorney with a reasonable degree of rational understanding and a rational as well as factual understanding of proceedings against him." The evaluations must assess a defendant's ability to assist their legal counsel, meaning that they understand the legal charges against them, the implications of being a defendant, and the adversarial nature of the proceedings, including the roles played by defense counsel, prosecutors, judges, and the jury. They must be able to communicate relevant information to their attorney, and understand information provided by their attorney. Finally, they must be competent to make important decisions, such as whether or not to accept a plea agreement.