Final answer:
A summary proceeding under Illinois law, known as a summary judgment, allows the plaintiff to obtain immediate fee simple title to real property when undisputable evidence suggests they will win without a full trial.
Step-by-step explanation:
Under certain circumstances, Illinois law permits a summary proceeding which is a legal process where the plaintiff or condemner can obtain immediate fee simple title to real property without a full trial. This process is commonly known as summary judgment. It is used in cases where one party has evidence so strong that there's no disputable issue for a jury or judge to decide upon. The defendant is given the opportunity to present their case, but if the court determines they could not possibly win at trial, a summary judgment can be granted. This mechanism allows for a more efficient legal process by resolving cases or claims before they proceed to a full trial when the outcome is considered evident.