Anchor: Case studies do not compare individuals or groups to others randomly assigned to different treatments.
Entailed: Case studies don't compare people that have different treatments.
Contradiction: Case studies always compare people that have different treatments.
Contradiction: I'm glad she did all that work on the data and kept detailed records of every change made to it.
Contradiction: Most of the studies did not directly control for PM2.
Contradiction: A dog is reading a book to a child.
Contradiction: It's worse because it's a tree.