The Lazy Monitor

The lazy monitor is Kahneman's structural description of the relationship between the two cognitive systems. System 2 possesses the computational capacity to detect and correct System 1's errors. It does not lack the ability. It lacks the inclination. Running System 2 is metabolically expensive; it fatigues; it has limited working memory; and it processes sequentially where System 1 processes in parallel. The consequence is a cognitive architecture in which the check function exists but is exercised selectively — triggered by surprise, contradiction, or deliberate effort, and otherwise dormant. The lazy monitor ratifies fluent output without inspection. In AI collaboration, this disposition becomes catastrophic: the machine produces precisely the smooth, coherent, confident output that gives the monitor no reason to wake up.