so when you dream your subconcious is working your concious has become innactive
notice how when you dream you remember when you awake how you remember parts of the dream or even the whole of the dream in detail but never the beggining
thats were inception comes into place
you can in fact give someone an idea without them knowing whereit came from
like how you dream about doing something like riding down a hill on your bike and the next morning you remember it so you try to attempt it
you see when the concious is innactive the memory part of the brain is still working
so some dreams you remember.
There is a movie coming out called MALL with this kid takes a drug that makes his visualization supersensitive.
So there are drugs out there that can hyperstimulate your ability to visualize things with your mind just as there are certain things you can do to control your dreams allowing you to work both stimuli in your brain at once, your concious and subconcious.