Daniel Kahneman's dual-system theory explains how humans think using two different systems: System 1 and System 2. System 1 operates automatically and quickly, relying on intuition and emotions to make decisions. It is responsible for our immediate reactions and gut feelings, often leading to quick judgments without much thought. In contrast, System 2 is slower and more deliberate. It involves analytical thinking and requires effort to process information. This system is used for complex problem-solving and critical thinking, allowing individuals to evaluate options and make reasoned choices. Together, these systems help navigate everyday decisions and challenges.