I worked with one institute, we saw data of mental patients - does job improve health? In 6 month, only those who were better health got job and those same ppl health improved. If we see simple, those who got job health improved, but they were better anyway !! see data in many ways !! Creative work can improve mental health - my experience - mind occupied, no stress
Retail - Cheap product sells more, but better selling product shop keeper prices more !! What is relation between price-sales in data?? Compare similar days - only price different
Drone comes where there is observation tower, low crime where there is police :-)