Central premise = fatally flawed plot hole

The central premise of the film ‘Limitless’ (2011) and its source novel ‘The Dark Fields’ (2001) is fatally flawed, since it is predicated on an urban legend. When Vernon introduces Eddie Morra to the NZT48 drug MacGuffin, he perpetuates the old “We only use 10% of our brain” myth (though doubling it to 20%), and Eddie fails to challenge him. Since that myth is false, it’s also false that 30 seconds after taking a ‘miracle pill’ anybody could become hyper-intelligent and memory-perfect.

The old “We only use 10% of our brain” myth has been extensively debunked [1] by, for instance:

• Neuroscientist Barry Beyerstein in "Whence Cometh the Myth that We Only Use 10% of our Brains?", in Prof. Sergio Della Sala's ‘Mind Myths: Exploring Popular Assumptions About the Mind and Brain’, 1999
» http://www.amazon.co.uk/Mind-Myths-Exploring-Popular-Assumptions/dp/04 71983039

• Psychologist Benjamin Radford, Managing Editor of the ‘Skeptical Inquirer’, at Snopes.com, 2007
» http://www.snopes.com/science/stats/10percent.asp

• Professor of Human Cognitive Neuroscience Sergio Della Sala in ‘Tall Tales about the Mind & Brain’, Xmas lecture in Edinburgh, 2008
— 'We only use 10% of our brain' myth debunked from 23:00 to 41:30
» video, 57:07 – http://www.ed.ac.uk/news/all-news/dalyell-prize

• Mythbusters Grant Imahara, Kari Byron, and Tory Belleci, in ‘MythBusters’ Episode 151, 2010
» http://mythbustersresults.com/tablecloth-chaos

Even with the willing suspension of disbelief in primary physiological/psychological truths, the films still fails – because as many authentically intelligent reviewers and board posters have pointed out, the writers just weren’t up to the task of writing a convincing hyper-intelligent memory-perfect protagonist, let alone a likeable one.

The only level on which the film works is as an allegorical and satirical fable on the dreadful state of C21 American society – desperate for the 30 second quick fix solution in pill form, addicted to vulgar materialism and “I'm all right, Jack” narcissistic egoism, obsessed with recreational sex, and mired in dog-eat-dog casino capitalism where businessmen are morally equivalent to drug dealers, all ruled over by the plutocracy of Big Capital. I guess you’re getting dealt the kind of decadent films you deserve.

dalinian

[1] The 'We only use 10% of our brain' myth has been extensively debunked – for instance:

• Studies of brain damage: If 90% of the brain is normally unused, then damage to these areas should not impair performance. Instead, there is almost no area of the brain that can be damaged without loss of abilities. Even slight damage to small areas of the brain can have profound effects.

• Evolution: The brain is enormously costly to the rest of the body, in terms of oxygen and nutrient consumption. It can require up to twenty percent of the body's energy – more than any other organ – despite making up only 2% of the human body by weight. If 90% of it were unnecessary, there would be a large survival advantage to humans with smaller, more efficient brains. If this were true, the process of natural selection would have eliminated the inefficient brains. By the same token, it is also highly unlikely that a brain with so much redundant matter would have evolved in the first place.

• Brain imaging: Technologies such as Positron Emission Tomography (PET) and functional magnetic resonance imaging (fMRI) allow the activity of the living brain to be monitored. They reveal that even during sleep, all parts of the brain show some level of activity. Only in the case of serious damage does a brain have "silent" areas.

• Localization of function: Rather than acting as a single mass, the brain has distinct regions for different kinds of information processing. Decades of research have gone into mapping functions onto areas of the brain, and no function-less areas have been found.

• Microstructural analysis: In the single-unit recording technique, researchers insert a tiny electrode into the brain to monitor the activity of a single cell. If 90% of cells were unused, then this technique would have revealed that.

• Metabolic studies: Another scientific technique involves studying the take-up of radioactively labelled 2-deoxyglucose molecules by the brain. If 90 percent of the brain were inactive, then those inactive cells would show up as blank areas in a radiograph of the brain. Again, there is no such result.

• Neural disease: Brain cells that are not used have a tendency to degenerate. Hence if 90% of the brain were inactive, autopsy of adult brains would reveal large-scale degeneration.

~ Neuroscientist Barry Beyerstein, quoted in ‘10% of brain myth’, Wikipedia
» http://en.wikipedia.org/wiki/10%25_of_brain_myth