The idea of this thread is the present support or answers to the question of what ghost are. More importantly what they might actually be caused by.  https://www.scientificamerican.com/article/6-possible-scientific-reasons-for-ghosts/ https://theconversation.com/hearing-ghost-voices-relies-on-pseudoscience-and-fallibility-of-human-perception-48160 https://wellcomecollection.org/articles/XO2LKRAAAENibaF7 (ouija board) https://theconversation.com/psychotic-experiences-are-quite