Insight as to why we can't read text or do logical things in our dreams...
I was speaking to this guy today, I believe he's done lucid dreaming for quite a while now. He's also very good at psychiatry and helping people cope with stress, emotions, etcetera.
He told me that our brain is divided up into two different sections, figuratively speaking, of course. There's the emotional part of our brain (emotions), and the intellectual (which controls reason and ideas). During dreams, even lucid ones normally, the intellectual part of our brain is shut down or almost off, and this is what allows us to interpret signs, read books, and do simple math. Perhaps this is why we can't usually read things in dreams, or do similar activities.
Mind you, I have read a few things in dreams, but that was when I was almost totally aware and "awake" inside the lucid dream. Sometimes that part of your mind is turned on.
During dreams, the emotional part of our brain is at work, and this is why most of our dreams involve things we hate, love, dislike, and are afraid of.
Thoughts?