I always change and experiment with code so I can better understand it, but this is unclear to me !?

Question

https://code.sololearn.com/cMMB6A8oFUeH/?ref=app

Answer 1

that property returns you true and then you try to set that to false, that is wrong

Answer 2

Using @property is usually used to clear out facts about classes.
You cannot change them.
This is used to prevent errors.