[quote=@Zarkun]
We don't even use ten percent of our brain's full functions.
[/quote]

Myth.

[url]http://hub.jhu.edu/2014/07/24/busting-a-brain-myth[/url]
[url]https://faculty.washington.edu/chudler/tenper.html[/url]

The reason people think that is because a great deal of our brain's functions are automatic.  If we used '100% of our brain' consciously, then we would have to consciously breath, pump blood through our veins, figure out the right emotions to use for a given situation, process sensory inputs from all of our senses, and find every memory one moment at a time.  It would not be fun.

[quote=@Caits]
<Snipped quote by Lugubrious>

It isn't impossible. 

I have heard people speaking to me, when I was unconscious. the brain is a weird, wonderful, unknown organ. As much as we know about it, there's much much more that we don't know about it. 
[/quote]

Let's say Sanders goes off what has been scientifically proven then, not weird, wonderful, unknown happenings.