System 2, on the other hand, allocates attention to effortful mental activities, such as complex calculations, logical reasoning, and decision-making that require deliberate thought. It takes control when we are faced with novel or difficult situations that cannot be managed by System 1. While System 2 is more accurate and rational, it is slower, more deliberate, and more effortful. The limitation of System 2 is that it has limited capacity and endurance, which can lead to mental fatigue and a tendency to default to System 1.