So I heard that in a dream anything is possible and the physics of the real world do not apply in them. So how come no one can, for example, find out what the fourth dimension is while inside a dream? If the physics of THIS world do not apply in dreams why does everything still seem so limited in them?! You would think there would be so many answers and solutions people could find just by lucid dreaming but this doesn't seem to be the case. Or am I just being dumb and completely missing something here?