You know, there is a lot of information from outside, which we do not need at all, but which we have to perceive anyway, because we can do nothing in order to protect themselves from such information. And we have to listen to rumors, to insulting or simply information in which we do not find any need. And this information can spoil our mood, can really hurt us, can occupy our brain for some time… It is known that word can even kill. So, I dream that such a filter could be invented, which could filter out undesired information and keep your brain safe from its harmful effect.