This is a good question, but based on my experience, I have come to the conclusion that the mindset that characterizes the three groups really go beyond engineering or computing. It takes a certain amount of curiousity, interest, ability, learning and so forth to have a type 3 mindset and some of that simply cannot be externally driven.

Having said that, encouragement is good. Share what you learn as you do it, talk about the books you've read and what benefit they provide. Sometimes people just need an example closer at hand to see their own potential.

In the end, it really up to each person to decide how they want to approach life.