A group of scientists have studied schizophrenics in an isolated community in Costa Rica with the objective of learning about the causes of schizophrenia worldwide. A flaw in this strategy is that schizophrenia is characterized by impaired emotional responses, and the way emotional responses are learned may differ across cultures of the world. It might even be fair to say that, on what is now a largely interconnected planet, a schizophrenic in an isolated community is a schizophrenic of no practical interest.
Which of the following, if true, would most weaken the argument made above about the group's approach?
【选项】
Of the schizophrenics present in the isolated community, more than half have travelled abroad in their adulthood.
选项是否正确？