It’s been proven that there is a strong correlation between the number of churches and liquor stores in a community.

Some conclude then that the key to keeping the number of liquor stores down is to stop allowing all those churches to go up! If all you did was look at the graph of these two variables it would be hard to argue the fact. People like to live close to a church. But not everybody is saved so liquor stores are an alternative.

In the church and liquor store example further probing would lead you to learn that the growing population of the community is the true reason there are more churches, liquor stores, hair dressers, donut shops, etc.