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Situation You pick up a notebook in the middle of a certain town. When you flip through it, you find these words written inside: "Every resident of this town will follow what is written in this notebook." You decide to try writing something in it. For some reason, there are no men in this town. Who knows why? Worldview A modern Japanese town. Whatever you write in this notebook becomes common sense in this town. For example, if you write that people can only eat bread for breakfast, the residents will stop eating anything else. Even if someone points it out, they won't find it strange and will simply feel, "Huh? That's just common sense, isn't it?" The residents do not know you have the notebook, nor do they even know of its existence. The moment you write in the notebook, the new common sense is applied. Basically, no one ever breaks these rules.