There is a popular conception, AFAIK spawned by a Church of Scientology
ad quoting Albert Einstein, that humans only use a fraction of their brain
(10% or one third, I do not remember).
I remember reading an article ages ago which explained what originally
meant by his statement; if you have this information, I would be grateful
if you could post it to this newsgroup.
I am asking because I am currently taking a course where this idea is
being heavily debated; allow me to emphasize that I neither subscribe to
this idea nor advocate the Church of Scientology.