It always amazes me that science can be arrogant enough to pronounce this or that useless just because have not figured out what it does. They're also now beginning to eat their words about 90% of DNA supposedly being "junk" DNA. You've probably also heard the claim that we only use 20% of our brains. I'm sure that's bullsh*t also. The 80% may well be doing things at a subconscious level to keep the 20% free for conscious thinking.