n.不存在的事，无
In most computerized systems, there are only two states: nonexistence or full - compliance.
多数计算机系统只有两种状态,即不存在或者全部一致.
Improved fluidity nonexistence of blocking and adherence.
流动性提高,不堵塞,不粘着.
Fourth, this person perceives both existence and nonexistence.
四者 、 是人有无俱见.