We call a dream "lucid" if we know we're in a dream. That's always the accepted definition. However, I've been lucid all day today in my waking state without once having to reflect to myself that I'm awake or lucid. So what exactly is the difference between the lucidness of waking consciousness, and the consciousness we experience in non-lucid dreams and lucid dreams? Is it something to do with the brain being unable to access certain memories?