The answer to this question is actually right next to the title in the forum category column - beliefs.
While one can argue how reasonable (or unreasonable) the JW doctrines are, underneath it all is how thought driven the religion is, to the exclusion of the heart. This is why some people will note how intellectual the Witnesses are - not that they are particularly smart or hold views that reflect such, but it's just a matter of what the whole thing is running on, or how it functions.
So in a sense it is like the heart waking up when it happens, and when you get right down to it it's not separate from the mind. So sometimes people will start all this research and such, but the thing that prompted them to do so may not have been intellectual in nature. While some people just have an intellectual temperament, this pattern of imbalance still exists when that happens. That's why sometimes the emotional dimension and beyond that the whole human dimension remains unresolved in spite of the person being very intelligent and very well informed. The Witnesses like to say the Watchtower and Awake teaches you how to live, but if anything it just teaches you how to live from your mind. How reasonable your thinking is is not even relevant here, it is just that kind of imbalanced conditioning where one is in a lower heirarchical relationship with the mind, which only means separation within yourself.
So I have to say the JW mindset is based on thoughts rather than a living intelligence, or the intelligence of actually living, which is not meant as a derogatory remark - it is just a matter of unconsciously following orders. It actually reminds me of where the bible says "forgive them, they know not what they do."