Common sense As one of my favorite art, I mention Optical Illusions. It's an artistic technique hiding more than two perspectives, entertaining audience with confusion. Once obsessed with one side of the perspectives extremely, it's merely possible to be aware of another one till someone else points out. It is not applied only for pictures: "common sense" works in the same way among human relation. Two individuals look at the same information and someone else asks them opinions to each of them. One might honestly answer what he/she actually sees, whereas the other brings up something not described at all, although it still fairly makes sense. Believe it or not, the latter one goes into that side so it shuts out another possibility and persistently insists on the one's own perspective, which is not acceptable to the opponent, too. After all, both of them resorts to the same word "common sense". It's not wrong to advocate either side, but still important to avoid employing the idiotic word to terminate the argument. It's not the matter of whether you wrong or me wrong, but whether you can willingly put yourself into the opponent's shoes. "Common sense" is the word that I hate the most ever.