Merged with previous Identical Twins and Type thread
Two questions and some thinking about them.
Are there any research of identical twins and their MBTI type?
Is persons MBTI type innate?
If identical twins MBTI types are different, then that would mean that MBTI type is not innate. That would mean that environment has the most effect on MBTI type (or would it?). So environment would shape a person to what s/he is. That would mean that anybody could be of any type. But that's not true. My children are living example of that. They are all born different even if they have the same mother & father (even if the living conditions, family situation etc. are different when each child is born).
If identical twins MBTI types are the same that would proof that MBTI type is innate because the twins have the same genome. That would mean that the real MBTI type wouldn't change during your life and that everybody would have only one true type (which they wouldn't necessarily recognize because of the pressure from the people/society around them).
It is possible that some of the MBTI functions are innate and some are affected by the environment. Or rather, we are born with a certain abilities and the environment has some effect on the outcome (our personality).
What do you wise people say about this?
My reasoning is usually quite imperfect + has some mistakes, I readily admit it.