Check out some of these experiments with patients who have had their brain's hemispheres separated and how both sides of the brain have their own individual "consciences"
WikipediaDual consciousness is a theoretical concept in neuroscience. It is proposed that it is possible that a person may develop two separate conscious entities within their one brain after undergoing a corpus callosotomy. The idea first began circulating in the neuroscience community after some split-brain patients exhibited the alien hand syndrome, which led some scientists to believe that there must be two separate consciousnesses within the brain's left and right hemispheres in competition with one another once the corpus callosum is severed.The idea of dual consciousness has caused controversy in the neuroscience community. It has not been conclusively proven or disproven.
https://en.wikipedia.org/wiki/Dual_consciousness
