From Andy McGee, Adelaide, South Australia
Further to your exploration of the wide variety of ideas about consciousness, biological consciousness is the only one we know exists. It is most likely to have come from an evolutionary process that involves reaction to stimuli, which allows entities to find energy sources. As such, levels of awareness in the biological world range from basic heat and light sensing to complex, abstract thought. Ice senses heat and reacts by melting, but it is probably not considered conscious by most (25 October, p 36).
