The nature of dreams and imagination as a dimension

On the matter of dreams I heavily disagree with the scientific theories presented thus far. Science holds the notion that dreams serve various neurological purposes usually related to the handling of memories. The brain is thought to be exercising, purging, transferring data, misfiring, responding to chemical build up, etc. There is also a wide spread belief that dreams are the sole privilege of humans. I say, bananas! Anyone who has had a dog or a cat, for example, would tell you otherwise. Now I don't know how far on the evolutionary tree dreaming goes but I'd guess it's quite common. And although it's without question that dreams do tend to stitch together things random, be repetitive, and often have common themes for everyone, I think the brain is more likely to be tapping on a universal language, and using symbolism to some end, whatever that may be, an end holistic versus mechanical. Perhaps I refuse to believe that my dreams are simply a calculation, because that challenges my humanity, and I, for one, have no intention of letting my humanity go without a fight. And perhaps, as the norm tends to be, the truth is in the middle. But I believe dreams to be bigger than the practicalities of consciousness, spanning the full extent of what's imaginable. Imagination, in fact, I believe to be a dimension in its own right, which brings me back to string theory, and a happy reunion with science. It is possible that dreams come to fruition. It is possible that all we could imagine does occur. It is possible that we are able to experience these different intensities without knowing that that's what we are experiencing. It's a thought, it's an option.