From Gideon v. Wainright, the Supreme Court ruled that two opposing parties are in charge of presenting all evidence and questioning all witnesses. In a criminal case, the opposing parties are the prosecution and defense. * Politics Writ of Mandamus

The concept you are referring to is known as the **Adversary System**. This legal system is characterized by the opposition of two parties (the prosecution and the defense in a criminal case) who present their evidence and arguments to an impartial judge or jury. The ruling in **Gideon v. Wainwright** ensured that defendants have the right to counsel, which is a crucial component of the adversary system, ensuring that both sides can present their case effectively.