Passage Summary: Researchers found that some people with schizophrenia have brain damage that must have happened before they were even halfway through being a fetus, whereas people without schizophrenia didn't have this damage.

Reasoning: A significant percentage of people with schizophrenia have damage to the subplate, a brain structure that develops before the second fetal trimester, whereas people without schizophrenia do not have this damage.

Analysis: We are looking for a synthesis of these biological facts. Since the damage occurs so early in fetal development and is found only in the schizophrenia group, we can infer that for some individuals, the foundations of the condition are laid down very early in life. This suggests that schizophrenia isn't always something that develops solely due to later life events. Look for an answer that highlights the prenatal origins or the developmental timeline of the disorder.