Definition: Unmodelled is a concept in computer science that refers to a situation or state where an algorithm does not have any explicit model of what it should do. This means that it is not able to predict its own behavior, and instead relies on its environment or data to guide its decision-making. For example, consider a robot that can perform tasks such as moving around, climbing stairs, or navigating through a maze. Without any explicit model of how the robot should move in each scenario, it will make