Dreams are the subject of much controversy in psychology, philosophy (specifically epistemology) and E2.
  • Psychology: do you really dream? Or does your mind create the memory of a dream when you wake? Can this be tested? How?
  • Philosophy: can we believe what we see? How do we know we're not just dreaming?
  • E2: are Dream logs real? Do people actually dream these things? How do we know? for that matter, how do we know that anyone else thinks, or exists? No, wait, that's getting into epistemology again...
  • Cybernetics: Do androids dream of electric sheep?