Wow... I had this same thought... While stoned and drunk out of my mind in Amsterdam...<p>It all boils down to information, information storage, and information processing. Draw a closed surface around any region of space. Information enters the bounded region in the form of light, fields, pressure waves, particles, potentials, etc... This information bounces around a bit, interacts with the matter and stored information within, and eventually, some information leaves.<p>Happens with empty space, a rock, a person, anything. Who is to say that this process has any more meaning when a brain is involved...