Slow thinking required

File this in the bucket of items requiring "slow thinking" ala Kahneman.There is an active outbreak of the Cyclospora parasite in multiple U.S. states, which the formidable epidemiologists at the CDC are investigating. I featured their work in Chapter 2 of Numbers Rule Your World (link). The scientists have narrowed the suspected contaminant to lettuce, which is a common culprit. They then announced a positive test result for Cyclospora in a specific batch of lettuce at Taylor Farms. This is part of the "traceback" investigation. Last week, they rescinded that announcement, calling it a "false positive". More info hereTaylor Farms is a large producer that supplies Taco Bells and Walmart, amongst other clients. The lettuce in question is grown in Mexico and imported to U.S. As is typical in these situations, these farms voluntarily recall large amounts of produce.In a short paragraph, the FDA stated:Due to the complexity in detection of Cyclospora, FDA laboratory experts re-reviewed…