This theory provides a correlation by combining two aspects. Because the rainy weather leads to relatively cooler temperatures, people might prefer to drink hot soup. On the other hand, because people tend to get wet in the rain, they are also more susceptible to the flu. Therefore, there is a positive correlation between the consumption of hot soup and the instances of flu.
However, this theory does not provide causation. Causation refers to a cause–and-effect relationship between the two variables of a theory. In the given example, it is not possible to conclude that hot soup causes the flu just because the two aspects have a common factor—the rain. Therefore, the theory does not present an accurate causal factor.
