In order for autism to be a cure for schizophrenia, you would have to 'catch' autism as if it was a microbial or viral disease, which it isn't. Same for schizophrenia being used to cure autism.
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The mere fact that science may not yet adequately explain an object, event, or experience does not mean the immediate explanation should automatically default to a conspiratorial, extraterrestrial, paranormal, or supernatural cause.