Our Brains Don’t Hold Information as Well as We Think

Anyone who has ever misplaced their keys or their wallet knows that the brain can be a bit faulty. If you have ever been convinced you saw a snake only to find out it was a plastic bag, or if you remembered dropping a pan full of sweet potatoes as a child during Thanksgiving only to get into an argument with your brother about which one of you actually dropped the pan, then you know your brain can misinterpret signals and mis-remember events. For some reason, our hyper-powerful pattern recognition brains seem to be fine with letting us down from time to time.


In The Elephant in the Brain, Kevin Simler and Robin Hanson write, “There’s a wide base of evidence showing that human brains are poor stewards of the information they receive from the outside world. But this seems entirely self-defeating, like shooting oneself in the foot. If our minds contain maps of our worlds, what good comes from having an inaccurate version of these maps?” 


The question is, why do we have such powerful brains that can do such amazing things, but that still make basic mistakes all the time? The answer that Hanson and Simler propose throughout the book is that having super accurate information in the brain, remembering everything perfectly, and clearly observing everything around us is actually detrimental to our success as a social species. Our view of the world only needs to be so accurate for us to successfully function as biological creatures. We only need senses that satisfice for us to evade predators, avoid poisonous mushrooms, and get enough food. What really drives the evolution of the brain, is being successful socially, and sometimes a bit of deception gives us a big advantage.


It is clear that the brain is not perfect at observing the world. We don’t see infrared wavelengths of light, we can’t sense the earths magnetic pull, and we can’t hear as many sounds as dogs can hear. Our experience of the world is limited. On top of those limitations, our brains are not that interested in having an accurate picture of the information that it actually can observe. We must keep this in mind as we go through our lives. What can seem so clear and obvious to us, may be a distorted picture of the world that someone else can see as incomplete. A good way to move forward is to abandon the idea that we have (or must have) a perfect view and opinion of the world. Acknowledge that we have preferences and opinions that shape how we interpret the world, and even if we are not open to changing those opinions, at least be open to the idea that our brains are not designed to have perfect views, and that we might be shortsighted in some areas. We will need to bond with others and form meaningful social groups, but we should not accept that we will have to delude our view of the world and accept alternate facts to fit in.

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