The appearance of invention can be divided to three types. One brakes off the conventional inconvenience. Another one makes something conventionally impossible to be possible, and the other one makes it even worse. However, it takes time for us to realize that the last type of inventions is actually making it worse. recently, we have had many IT tools since windows 95® has been sold out. Actually it's been only 10 years since many people started using personal computer. It's high time for us to realize that those inventions are not always good.
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