""If I didn’t know I was in a room, couldn’t touch the walls or reach the ceiling, how would I even know if I was in a room or if there was even a ceiling."" CORRECT 100% agreed. The evidence was there but you were UNABLE to collect it Therefore there was LACK OF UNDERSTANDABLE evidence You have correctly answered the question. Does LACK OF UNDERSTANDABLE evidence = not exist ? NO ** Cosmic rays have been around a long time. Centuries ago could we 'see' them ? NO Did we have UNDERSTANDABLE evidence of them ? NO So did that mean they were not there ? NO