This word means rational value, which is a fictional concept in Cthulhu mythology.

In the story, when people come into contact with something indescribable or too horrible, people's reason will be lost to varying degrees, which will lead to madness or other mental problems. The setting of lowering SAN value aims to emphasize the sense of terror and enhance the immersion of the story.

On the Internet, SAN value is often used to describe someone's incomprehensible or "crazy" behavior, or to express someone's mental state after a strong impact.

solemnly declare: the above contents are for reference only, please don't be blindly superstitious.