Anchor: Case studies do not estimate statistically the influence of the many variables on the instance being examined.
Entailed: Case studies dont estimate the effects of variables. 
Contradiction: Case studies can estimate effects of variables. 
Contradiction: A woman is walking her cat.
Contradiction: The post used to be just for inter-city communications.
Contradiction: There are only children around the table.
Contradiction: You said you cleaned up your act.