Most of this is kinda of one sided, I'm breaking that.
I believe that minds can connect.. This belief opens up any different theorems like empathy, finishing another's sentence, someone saying an answer to a question the exact way you would have if you were asked first; on a larger scale, dream walkers, dream guides, religious figures, Psionic abilities, Chi excercises, etc. The list can go on and on... But note, whenever a connection is made.. it will never go unnoticed. There is always a sort of feel carried with it. Its unexplainable if you havent felt it, but when you experence an outside source in your mind will know for a guarantee that it was an outside force/person.
Though, thinking on the subject alone records it in the subconcious, in turn, dreams of such can be induced. But in the back of your mind you'll know the difference despite what you tell ppl.
People's belief are too diverse to generalize what is what. If you think on it long enough you'll find your own answer.