David "the Devil's Advocate" Huntsberger... almost every episode so far has started with David explaining a prevalent and widely accepted scientific theory and following it up with... "but IS that true?" Don't you think dementia is just old people mastering inter-dimensional travel? Deja Vu means we're all clairvoyant... Crop circles are real, aliens carved mountains in Australia (or somewhere!) I love it though... every show needs some kook with half baked ideas, haha! Also side note... David said in one ep that he trained his Iris to see better and get better depth perception, only to doubt the existence of depth at all on this episode!