What Does Kahneman Mean By System 1.1?

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Kahneman refers to intuitive cognitive processing as System 1 and deliberate cognitive process as System 2. System 1 “operates automatically and quickly, with little or no effort and no sense of voluntary control” (Kahneman 20). System 1 is utilized when we calculate 1+1. We automatically know that it equals two without any form of effort because “mental activities become fast and automatic through prolonged practice” (22). In this case, we learn addition at such a young age and continue to add more complex numbers as we age. As a result, we can automatically do 1+1 in our head without any effort just by recognizing it.
On the other hand System 2 “allocates attention to the effortful mental activities that demand it, including complex computations.