Why does your brain do this? Just as with habits, it wants to save energy. System 1 thinks it can handle it, even though it actually can’t, and you end up making a mistake. When system 1 faces a tough problem it can’t solve, it’ll call system 2 into action to work out the details.īut sometimes your brain perceives problems as simpler as they actually are. Then, if the bat costs $1 more, it comes out to $1.05, which, combined, gives you $1.10. Once you spent a minute or two actually thinking about it, you’ll see that the ball must cost $0.05. If your instant and initial answer is $0.10, I’m sorry to tell you that system 1 just tricked you. Here’s an easy trick to show you how this conflict of 2 systems affects you, it’s called the bat and ball problem.Ī baseball bat and a ball cost $1.10. Lesson 2: Your brain is lazy and causes you to make intellectual errors. They often fight over who’s in charge and this conflict determines how you act and behave.
However, these 2 systems don’t just perfectly alternate or work together. It’s what helps us succeed in today’s world, where our priorities have shifted from getting food and shelter to earning money, supporting a family and making many complex decisions. System 2 is one of the most ‘recent’ additions to our brain and only a few thousand years old. This system is at work when you’re meeting a friend and trying to spot them in a huge crowd of people, as it helps you recall how they look and filter out all these other people. It helps you exert self-control and deliberately focus your attention. System 2 is very conscious, aware and considerate. Not having to think before jumping away from a car when it honks at you is quite useful, don’t you think?
System 1 is a remnant from our past, and it’s crucial to our survival. It’s the system you use when someone sketchy enters the train and you instinctively turn towards the door and what makes you eat the entire bag of chips in front of the TV when you just wanted to have a small bowl. Kahneman labels the 2 systems in your mind as follows. If you want to save this summary for later, download the free PDF and read it whenever you want.ĭownload PDF Lesson 1: Your behavior is determined by 2 systems in your mind – one conscious and the other automatic.
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