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Michio Kaku's theory on quantifying consciousness suggests consciousness is the number of feedback loops required to create a model of your position in space with relation to other organisms and time. Buy the best selling book (WINNER OF THE 2014 BRAIN PRIZE ) Consciousness and the Brain: Deciphering How the Brain Codes Our Thoughts - http://amzn.to/20WYo7U He believes a thermostat has 1 unit of consciousness - it senses the temperature around it. A flower has around 10 units of consciousness - understands temperature, weather, humidity, gravity, etc. Level 1 Consciousness: Example - reptiles. Understand position in space. Level 2 Consciousness: Example - mammal. Understand relation to other organisms - emotions, social hierarchy. Level 3 Consciousness: Example - humans. Understand relation to time, ability to imagine the future. Some other useful resources about Consciousness - https://en.wikipedia.org/wiki/Consciousness https://www.youtube.com/watch?v=0GS2rxROcPo http://bigthink.com/videos/consciousness-can-be-quantified http://www.iep.utm.edu/consciou/ http://www.economist.com/news/science-brief/21664060-final-brief-our-series-looks-most-profound-scientific-mystery-all-one http://plato.stanford.edu/entries/consciousness/