In light of the soon-to-be-released movie "Lucy" in which a woman steadily gains the use of 100% of her brain and develops telekinetic powers, I have to ask: Why does this ridiculous myth that humans only currently use 10% of our brains persist despite having absolutely no scientific evidence to back it up?
In fact, there is even quite a bit of evidence to the contrary and shows that we do, in fact, use 100% of our brains. Are people really just that desperate to believe there is the possibility of becoming something much greater than what they already are?
While any given percentage is arbitrary (no means to calculate anything even nearly as complicated currently), it stands to reason that humans use only a small part of the potential their mind has for conscious thinking/awareness. That (obviously) doesn't have to do with telekinesis existing or not.
I think that most people likely use only a fraction of their mental abilities, for a large number of reasons (most common of those probably would be lack of self-knowledge in the first place). It doesn't help that we live in a rotten era. If one has to deal with more pressing issues (eg money or food) it is unlikely they would focus much on self-awareness.