In Thinking Fast and Slow, the psychologist Daniel Kahneman described the human mind as operating in two basic modes of thought. System 1 thoughts are typically fast, automatic, effortless, associative, and implicit, which means they are not available to immediate introspection. They often carry a lot of emotional weight and are ruled by habit and, as a result, are very good at getting us hooked. System 2 thoughts are slower and more deliberative. They require much more effort and a deeper level of attention. They are also more flexible and amenable to rules that we consciously establish. It
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