System 1 and System 2

System 1 and System 2 are concepts from psychology that describe two modes of thinking. System 1 is fast, intuitive, and automatic; it's how we make quick judgments and decisions without much thought. For example, recognizing a friend's face or reacting to a sudden noise is System 1 in action. System 2, on the other hand, is slow, deliberate, and analytical; it's engaged when we solve complex problems or think critically about a decision. Both systems work together, with System 1 handling routine tasks and System 2 stepping in for more challenging situations.