The more technology we have the more with have the potential to become less intelligent. The idea is really simple: we stop relying on our brain and more on our technological devices.
For instance, without Google, we would be forced to use our memory more in order to learn the information instead of looking it up every time. Without the calculator, we would learn to do faster mental calculations, etc.
This is a concept mockingly illustrated in the Idiocracy movie.
Having said that, we can also become much smarter with technology if we use it in a productive / good manner to enhance our learning capabilities.
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