Perhaps what the grandparent meant is that we have little clue to how exactly any particular change in non-coding DNA actually affects the functioning of our mi

Perhaps what the grandparent meant is that we have little clue to how exactly any particular change in non-coding DNA actually affects the functioning of our minds and bodies, we have few tools to study that beyond the seemingly obvious fact that it does have to encode the structure of all the organs of our body and the fundamental structure of our brains somehow.