From Olivia Goldhill at Quartz:
Not much is definitively proven about consciousness, the awareness of one’s existence and surroundings, other than that its somehow linked to the brain. But theories as to how, exactly, grey matter generates consciousness are challenged when a fully-conscious man is found to be missing most of his brain.
Several years ago, a 44-year-old Frenchman went to the hospital complaining of mild weakness in his left leg. It was discovered then that his skull was filled largely by fluid, leaving just a thin parameter of actual brain tissue.
And yet the man was a married father of two and a civil servant with an IQ of 75, below-average in his intelligence but not mentally disabled. More.
Zap! Just think of all the materialist theories of consciousness that disappear on impact.
Such brain-largely-absent cases are more commonly discovered now with the wider use of neuroimaging. Interestingly the person often comes to medical attention for a problem not apparently related to consciousness.
See also: Neuroscience tried wholly embracing naturalism, but then the brain got away
Would we give up naturalism to solve the hard problem of consciousness?
What great physicists have said about consciousness.
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