If the probability of the same or similar thing happening is very small, and it only reaches 1% or 2% within a certain range, it is called an accident. On the other hand, if the probability of the same or similar things happening is very high and reaches 100% within a certain range, it is called inevitability.

Therefore, the relationship between opportunity and necessity is like the relationship between the tip of the iceberg and the whole iceberg. The big iceberg gives people the feeling that it is a disguised small iceberg or a backstage boss hiding behind the small iceberg.

That's why it is inevitable to pretend to be accidental.