What is the point of Community resurrecting questions by unregistered users?

By definition they are never going to have accepted answers.

Error in sudo code? E: Type 'sudo' is not known on line 2 in source list


If you look at the timeline, you get a hint of what the purpose of this bumping is:

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

The point is not to have the author of the question accept the answer; the author isn't even notified when this happens. It's an indication to the entire community: please have a look at the answer and decide whether it's good or bad. (Or at the question.)

Right now, the question has a score of -1, which means it won't be bumped anymore.

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