I have my experience only from my meditation. I don't or cannot OOB and go to NMPR.
At first after meditation I was questioning myself where was it coming from? Most often, luckily for me, whatever was said to me in my meditation was smarter, wiser, and beyond my common intellectual knowledge. Very soon I stopped questioning myself. Most of the time provided information was easy to relate to my previous experience, and if I don't know what to make of it, I asked. Of course, I never I asked a scientific type of question, but I am not a scientific type of person. Only when I was asking about my family future I never got anything more than 50% close to what would happen later. I could myself make 50/50 guess too.
For example. I asked if I could assist with a transition. Everything has happen in my meditation. I am not going in details, since they are not important. A woman was telling her story non stop. I know, I could not make it in my mind right on a spot. I have not asked her what year was it. When I did Google search it did not bring me any word by word stories, which would tell me, that hers was a real story. Was it my imagination or was it a life story? Right now I've got to a point where things like that do not make any difference to me. This is uncertainty. I have asked time and again to be free of fear of uncertainty, and this is how LCS teaches, provides training, helps, and all of that slowly starts to make sense to me. This time learning started to be kind of harsh on me, and I asked to make it easy. I think I have a huge fear of uncertainty, and it could not be an easy start in such a training. When you observe carefully it is so clear, that anything and everything is uncertainty.
The same way my guides/my IUOC/LCS helped me to get rid of fear of death. It took me 3 years watching 'movies' in my meditation. Was I making them up, were they rendered to me personally or were they taken from a library of a standard 'movies'? Never asked, nobody bothered to tell me either. ;)) My fear is gone, and I am happy.
'Real knowledge is to know the extent of ones ignorance.' Confucius.