Yeah, I had a hard time believing that. Surely there's no way you could publish a paper purporting to be about health affects of what people ate if you only ask

Yeah, I had a hard time believing that. Surely there's no way you could publish a paper purporting to be about health affects of what people ate if you only asked them once what they ate and used that to evaluate a multi-decade time frame. That hardly seems better than basing your findings on intuition.