In line with the post by GrreatThinker--
I have a "high" IQ, was a child prodigy, and still test high on intelligent quotient tests in adulthood. I qualified for membership in Mensa International after my first test in my late 20s.
However, there is no such thing as a standard scale for measuring an IQ. I learned this after my first exam from the psychologist who tested me.
When people say "I have an IQ of 130" that doesn't mean anything because of the lack of a universal standard scale. The "130" is a score on a particular test, and it can be equal to an "83" on another and a "157" on another, and be called "average" on a totally different one that doesn't employ number scores.
Mensa International accepts for members those whose IQ test(s) reveal scores above 98% of the testing population, or at 2% or less on the far right of the Bell scale. If, just to give an example, you tested at "130" on a certain exam, but according to how the population is testing "130" was the average adult score for those taking the same test, then you wouldn't qualify.
If "130" on a totally different exam was only reached by 2% or less of the testing population, then you could be accepted as a Mensa member.
But there are things you need to take into account:
1. Most people, except for the most mentally gifted, will test lower and lower on IQ tests as they age. If you took a test as a youth, your score on the same test will likely be lower today (and that's totally normal for most).
2. High IQ scores don't always mean "smart" people. Just because you can beat any computer playing chess doesn't mean you have what it takes to balance a checkbook or get along with people or make a success of your life. Most people with high IQs have low EQs, meaning they have a hard time emotionally relating to the general public. Many of these people cannot hold down jobs or handle intimate relationships.
3. "Genius" doesn't guarantee "high IQ" or vice versa. Some people are very talented or have extremely high mathematical IQs but very low language IQs. Just about anyone can be a "genius" in their own field, but very few people with high IQs ever do anything that gets noticed by the world as "genius."
Lastly having a high IQ has nothing to do with religion. My pioneer partner and I roomed together for two years, both of us lucky enough to meet another in the Org who tested above average on IQ tests. But he was much more higher on the IQ totem pole than I was, scoring in the 1%. He also couldn't relate to the average JW or at least play along as I did.
I left the religion of the Watchtower after about only a decade of being in but he never did. I heard that he passed away just last year, still a JW. Logical thinking can only take you so far if you don't allow yourself access to data without prejudice. If you don't get all the information, your conclusions are always incomplete or incorrect.
My buddy wouldn't study the Chruch Fathers or accept certain conclusions of particular biologists and physicists, apply critical hermeneutic principles when approaching religious texts or accept any conclusion contrary to what came from the Governing Body. Why not? Because besides being right or correct, we often want to believe we are good people. He knew these things were not what made a "good" person in the eyes of the Witnesses.
So he chose to believe that the measurement for "good" was the JW leadership. Logically, with this as an unchanging, unbending ingredient to any formula you develop, no matter how well you keep thinking principles in check, the conclusions will always be wanting.
So a high IQ doesn't mean much, nor does being an "expert" at thinking logically (he was a professional technical problem-solver for big companies). We are rarely gifted to be a good judge of our own wants, desires, and emotional needs and how we let these cloud are judgment from time to time. And humans in denial will deny they are in denial.
Add to this, sometimes we confuse being correct or right with the moral quality of being "good." Being smart, intellectual, educated, a genius, and even correct are not moral qualities. But since we get raised being rewarded for good grades, get praise for parroting the "correct answer" at Watchtower studies, even promoted at work for often "thinking" in line with our employer's philosophy, it is never easy to separate the two.
You don't have to go to college, have a high IQ, or even be a specialist at forensics (logical deduction) to leave the JWs behind. You only need to be willing to open your eyes, accept facts regardless if they agree with you, and have the courage to leave it all behind. It doesn't take brains, necessarily. It takes will power and a desire to "do" right more than merely "be" right.