Let me all clarify for you all, as what is actually meant here is unspecific 1 if it means potential for overall uses Then yes we do use less than our brains full potential. see my other post for details 2 if it means utilizing every part at once Yes and no. We can only process so much info at once and thus can not use each part of the brain all at once to the maximum we could use each separately. However there are parts of ur brain that work around the clock that u do not control or think about these parts make up more than 10% of brain 3 if it means we only control 10% of our brain the rest is autopilot Then no. while it is true much of our brain is auto pilot the biggest part of our brain which the frontal lobe is our center of voluntary movements and higher thinking and decision making which we use all the time. However there is still a lot that are brain does under are perception Hope this clarifies comments if u have any further questions[spoiler]by the way if u comment tl;dr my response is your dick is to short didnt see[/spoiler]