To my knowledge JWs are not permitted to think.
That was the best answer, but for the discussion to blossom, I will offer more.
In many instances, JW's thoughts are controlled. They are controlled by
conditioning. When someone dies, they think, "Now they can be resurrected, so
they are better off than those that will die at Armageddon." That's not really
using your own emotions and concern, that's controlled training.
When a JW decides to pioneer and forego higher education, that's training, not
thinking. Between fear of destruction at Armageddon, or feelings of urgency to
"save" people from the same, JW's decide because their minds have been warped.
The difference between a "worldly" person's brain and a JW's brain is this-
The worldly person is influenced by various concerns when decisions are made.
The JW is influenced to put WTS first and foremost when any decisions are made.