The slow system likes to think it is in charge. In reality, it often rubber-stamps what the fast system proposes.
This happens because monitoring is tiring. The mind prefers coherence over accuracy, and it will accept an answer that feels right unless you force a check. Errors thrive in the space between “seems true” and “is true.”
Laziness shows up as satisficing: settling for “good enough” explanations, stopping the search early, and mistaking fluency for truth. Confidence can rise even when scrutiny is low.
Self-control is part of the same machinery. Resisting impulses, staying polite, and persisting through boredom all draw from the same pool of effort.
When that pool is depleted, you become more suggestible, more impulsive, and more likely to accept the first story that comes to mind.