What I can tell you is that spirits are real, from personal experience ~ knowsnothing
It doesn't seem that your view is supported by the brain scans which have been done of people who are channellers, spirit mediums etc:
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0049360
http://www.andrewnewberg.com/in-the-news/channeling-spirits-shuts-down-parts-of-brain
https://www.theatlantic.com/amp/article/361882/
https://www.google.ca/amp/s/amp.livescience.com/25055-medium-brain-trance-writing.html
https://www.seeker.com/amphtml/channeling-spirits-shuts-down-parts-of-brain-1766310573.html
http://channel.nationalgeographic.com/brain-games/articles/your-brain-on-god/
https://www.the-scientist.com/?articles.amp/articleNo/33312/title/Brain-Waves-from-the-Beyond/