Underdeveloped mind research?

Can a underdeveloped mind still understand a situation from a simple and dynamic standpoint? Like say if a child at 5 years old can understand natural selection if formatted correctly and more age appropriate, can it be a simple more dynamic way of understanding, like a 20 year old's understanding of natural selection?

Kevin72017-02-12T20:51:27Z

There is the case of Genie an American girl abused by her parents that did not learn language as a young child, though born with an normal she could not learn much language and other skills when found by authorities