wow, what a thread !
while I do not consider myself as highly intelligent, I do have the ability to discern someones thinking abilities to a degree. Through my job, I deal with a large number of all different kind of people, among them many with college degrees, even sometimes univ-professors.
I frequently have to argue against them in certain cases, and I am able to see someones capabilities on their field.
The same time I know a number of JW, some with, some without higher education. A few of them I consider the even most intelligent persons I met. ( of course, I also know quite a number of stupid ones too)
They have their doubts on certain areas, but all, and thats the main problem, accept the WTS as Gods org.
It seems, that for some, their intelligence might even be an obstacle of seeing simple truths, since their mind finds creative ways of defending their premisse.
So, among the brightest bulbs in the sky, there are also some JW, they just refuse to aapply the same critical thinking, of which they are certainly capable of, to the teachings of the WTS.