The common debate / narrative that has been portrayed in recent films such as Limitless and Lucy is that humans only use 10% of their brains capacity - where even a small increase to this could arm us humans with literally 'limitless' mental processing potential.
If you are like me then after watching these kind of films you find yourself in an exciting headspace where for a few brief moments of intense day dreaming you imagine a world where so much more is possible.
