One could conceivably argue that the answer to that question is best resolved by understanding whether we are dealing with a Liberal or a Conservative when we ask the question and start to make comparisons.
Given the state of the world today —– a world largely created by the use, misuse, application, and misapplication of Liberal political principles —– one could probably conclude that at least a little more than half the current population uses no more than about 10 percent of their gray matter.
These would be the Liberal “Takers” as opposed by the Conservative “Makers” in any given social order of being.
It does not require 90% of a functioning brain to become and remain totally dependent on an all-knowing, all-present, all-powerful and all-generous Liberalized governmental form.
Common sheep can do much the same as that!
There are some scientists who are totally convinced that the processes of evolution that resulted in the human brain did a far better job of constructing the organ than a lot of otherwise educated people might want to admit. There is scientific evidence to show that every available scientific test of brain activity available today shows that when the brain is subjected to technical or electronic scrutiny, most of the organ does light up in the tests leading to a general conclusion that it is possible that all the brain is used and none of it is dormant for very long periods of time.
The problem with what I just said is that I cannot find any evidence to suggest the differences in the brain activity of the more astute and aware Conservative Mind and the more or less dormant faculties of the Liberally-inclined mental mechanism.
So I have to reluctantly conclude that both the above are more or less equal in their abilities to light up a scope on some brain scanning device but being equal in their ability to react with a chemical or electronic stimulus has nothing to do with actual intelligence …. as the state of our country now shows …. a country nearly destroyed by an onslaught of 8 years of unrestrained Liberal political nonsense and now in the midst of an attempt by Conservatives to undo the damage.
I have long believed that brain activity, on the whole, can be localized. In the Liberal conundrum, I believe brain activity is localized to and confined in the regions of the reproductive mechanisms of the human body — or in those areas that govern elimination of human waste products.
I believe that the brain activity of the Conservative mindset can be localized in the superior cortex regions of the organ — those areas of the brain closest to being like the force that created them in the first place — the Creative Force (Spirit) from which all created things have come over the eons of time.
So you can readily understand that regardless of which mental genre we are speaking about here if either or both of them use 90% or more of their brain capacity, you can see how the difference in outcomes of such usage has come about.