This topic keeps coming up amongst the trainees and I have an area of confusion.

What does it mean that your mentoring has been bad? Is it all about *outcome*?

Is it about lab favoritism?

Does your mentor fail to advance the careers of everyone? Or is it just that you were not the favored one?

Are there specific things your mentor should and could have done for you that you can mention? Did you only recognize this is retrospect or was it frustrating at the time?