Probability theory question: No probability event, please give an example.

An improbable event is an impossible event, which of course refers to the impossibility under certain circumstances. Examples abound.

For example, if you are traveling during the National Day holiday and you have already boarded a plane, then it is impossible for you to take a train at this time.

You are a man. Within a certain period of time, it is impossible for you to become a woman, and it is impossible for you to have children...

If a person dies, he will live again. It's an impossible event.

Time has passed and it is impossible to turn it back.

It is impossible for you and your girlfriend to get into trouble over one thing and try to re-occur it to get a better outcome.

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