You don't directly say it, so maybe I'm reading you wrong, but you seem to be suggesting that this hypothesis is nonsense because autism existed before this preservative was used.
The article isn't saying that the only cause of autism is the preservative. It is suggesting maybe part of the increase is due to this preservative.
Although people died before cars existed, it doesn't mean that cars aren't the cause of some deaths today.
The article isn't saying that the only cause of autism is the preservative. It is suggesting maybe part of the increase is due to this preservative.
Although people died before cars existed, it doesn't mean that cars aren't the cause of some deaths today.