It may be instructive to read the Editor in Chief's piece as well as the Retraction Watch commentary. Of interest is that the plagiarized piece fabricated wholesale a study population, making the published results incorrect and possibly dangerous.
Could you ask specific questions? The second link seems to lay out the issues quite clearly to me, so I'm not sure where to start with a better explanation.
Sounds more like the poster is seeking a summary in simplified terms.
Specific to your point: if a person truly failed to understand the entirety of an article, I'm not entirely certain asking for specific questions will help as the person may not have a reference point upon which to build with answers to specific questions. Does that make sense?
I've spent enough time in support to realize that people's questions also convey their current thoughts and understanding even when they don't state it explicitly :).
It does, but I didn't want to blindly rephrase the article in some way and then missing the point that was the issue. Thus me asking instead of ignoring it completely. I didn't phrase the question very well though.
http://annals.org/aim/article/2592772/scientific-misconduct-...
http://retractionwatch.com/2016/12/12/dear-peer-reviewer-sto...