This is related to Why is hypothetical example code off-topic for Code Review?

Which is related to On-Topic question #3:

Is it actual code from a project rather than pseudo-code or example code?

It seems that we're not quite consistent in our treatment of "example code", which is what this meta post is for.

• Which kind of "example code" questions do we want to avoid with this rule, and why?
• Which borderline "example code" questions do we want to keep, and why?

I believe there are opinions and examples on both of these questions, so please bring on the examples and opinions and perhaps we can come to a conclusion on this topic.