Scientists cannot agree on what consciousness really is or what causes it.
REFERENCE
Horgan, J. and Horgan, J. Horgan, John, and John Horgan. “World's Smartest Physicist Thinks Science Can't Crack Consciousness.” Scientific American Blog Network. N. p., 2018. Web. 21 Mar. 2018.
Yohan John, Ph.D in Cognitive and Neural Systems. “How Does The Human Brain Create Consciousness?.” Forbes. 19 Apr. 2016. Web. 21 Mar. 2018. <https://www.forbes.com/sites/quora/2016/04/19/how-does-the-human-brain-create-consciousness/>
“Waking Up: A Guide to Spirituality Without Religion: Sam Harris: 9781451636024: