It is frustrating to try and find good information sometimes, so I do understand your question.
However, Quora is a forum where anyone can create an account and put forth whatever content they wish—good, bad, factual, or complete fiction. I've even seen people monetizing content that they flat-out plagiarized from other writers!
Therefore, it is on the reader to research more fully and decide which writings to give credence.
Free advice is always worth exactly what you paid for it—nothin’!
I do not believe it is a good use of your time to call people you don’t know on the internet names such as ‘coward’ or get too heated up or resentful if the information received from a random stranger proves to be unreliable. Lots of people have lots of opinions, it’s up to the reader to apply critical thinking, logic, and their own body of knowledge in order to identify what may be true and what may be false.
Just as an example, Quora seems to be full of people who apparently believe that NPD is caused by supernatural forces, demonic possession, shadow entities, aliens or other fanciful nonsense. I tend to just ignore people who are asking a question which leads with such a premise—my point of view is behavioral, psychological and physiological, I believe that NPD comes from childhood abuse or trauma, brain injury, or brain deformity , or some combination of those factors, NOT god or satan. So my thoughts and answers to a person who believes NPD is a demonic force is not likely to be satisfactory to that person. They may think I am providing “erroneous information” or being “cowardly,” whereas I think such beliefs are silly and unscientific. There’s no point in engaging with people I know aren’t going to find my replies welcome or useful.
Your local library is probably a good source of published information by experts on NPD, BPD, and other psychological disorders. There are also links to be found on the internet to the actual DSM (Diagnostic and Statistical Manual) used by psychologists and therapists in order to identify and diagnose various mental illnesses and disorders.
If you see a post on Quora where someone is spreading obviously false, defamatory, or otherwise damaging information, you may wish to comment directly on that person’s post, or take any of the other options Quora offers in order to downvote, block, or report that person.
Good luck in your quest for truth!
=====================They were monetized but I am giving them away for free here.
If you feel inclined to support my writing, here's my paypal
And if you prefer to pay it forward, I recommend Safe Place as an excellent place to support.