The slow, deliberate, and analytical mode of thinking in dual process theory that requires mental effort and conscious attention. System 2 is responsible for complex reasoning, following rules, comparing options, and making deliberate choices, but it is lazy and often defers to System 1.
Popularized by Daniel Kahneman in 'Thinking, Fast and Slow' (2011) as part of dual process theory. The numerical designation contrasts it with the automatic System 1, emphasizing the sequential and effortful nature of this thinking mode.
System 2 is like your brain's quality control department - it can catch System 1's mistakes and think through complex problems, but it's also lazy and energy-hungry! It often lets System 1 run the show because thinking hard is exhausting, which is why we fall for so many mental shortcuts.
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