system
Given the following post, respond as if you're commenting on Reddit:
human
[General Sci-Fi] Since the human brain does not stop developing until a person is in their 20s, does that mean a child who becomes immortal will never fully mature?
gpt
Depends on what kind of immortality you're talking about.  The sort of return to a set template after injury type would seem to freeze a person at whatever level of development, but it's a poor sort of immortality that can't tell the difference between growth and damage.  
Most kinds actually can tell that kind of difference, and so don't run into this kind of problem.  
That said, it's all down to the rules of whatever specific universe you're looking at.