How can people say this is brilliant?

Rating: 3/10 (14 December 2014)

Throughout watching Lucy, I face-palmed so many times that my forehead turned red. I started counting the the money I spent to buy this DVD in cents so that I too, can plug into another dimension and forget I ever bought it. The movie is based on the most wide-spread urban legend since the Loch-Ness monster. The fact that 100% of your brain is used (maybe not the director's) is the most classic example of debunking scientific misconception and I am surprised that there are still quite a few thousand people who still believe it. I pushed myself to watch it because I thought that it would be a "Limitless" copy but it turned out to be a lot less than that.
Defying the basic rules of the universe is a job for a superhero, and I tried to see this like watching another superhero movie. But the problem is that even superheros have a special ability that arises from exploiting unknown scientific concepts. Whether it is a humanoid for another planet, or a chemical reaction to an uncharted material, or even a smart-eccentric millionaire geek. All of the above have an unreasonable, yet a quite far fetched "believability" because they are based on facts you DON'T KNOW. Not on the De'facto KNOW it's not true. Even so, to be able to show a character defy the very laws of nature, there must, in my opinion, be some sort of a far fetched explanation, exploiting the unknown variable.
They might as well replace Scarlet with a talking CGI tree and remake the whole movie. It will make the same sense.