I've been playing assassin's creed 2 and I got to wondering what everyone's experience and thoughts are on this. I'm speaking more of the paranormal meaning of this word, where humanity has a collective memory to draw upon. People use this concept to explain how scientist throughout history have worked on the same thing at the same time despite being separated by great distances, culture, and language. It has also been used to explain Déjà vu and people who think they have seen past lives.
In my experience this is the most common form of paranormal interaction that people have. Many people get deja vu and/or dream of things that happen later.

