Since case study designs center on one or a few cases and lack the controls usually thought necessary to an understanding of causal relationships, knowledge that
Case study designs usually lack necessary controls.
There are no necessary controls to understand causal relationships.
people dives in the water.
I am extremely wealthy.
The library's legal program has been discontinued.
Three people sit at a table watching a woman
The woman is playing tennis.
One of the men is kicking a golf ball.