Looks like whether you are able to distinguish between imagination and reality is linked to a fold in the brain. Nothing concrete, but at the least interstering…

A Fold in the Brain is Linked to Keeping Reality and Imagination Separate, Study Finds | 80beats | Discover Magazine

« Jobs Lived 8 Years with Pancreatic Cancer, Steinman for 4, But It Was Steinman Who Beat the Odds. Here’s Why. US Drone Fighters Have Been Infected by a Computer Virus of Unknown Origin » A Fold in the Brain is Linked to Keeping Reality and Imagination Separate, Study Finds What’s the News: One of memory’s big jobs is to keep straight what actually happened versus what we imagined: whether we said something out loud or to ourselves, whether we locked the door behind us or just thought about locking the door. That ability, a new study found, is linked to the presence of a small fold in the front of the brain, which some people have and others don’t—a finding that could help researchers better understand not only healthy memory, but disorders like schizophrenia in which the line between the real and the imagined is blurred. Scans of a brain with a distinctive paracingulate sulcus (left, marked by arrow) and without one (right)