Premise: Take Samuel Cartwright, for instance, who in 1851 coined two ingenious new diagnoses to be applied to  drapetomania , or running away (recommended  whipping), and dysaesthesia aethiopis , whose symptoms were sloth and a tendency to break things (recommended  whipping).

Hypothesis: No new diagnoses for drapetomania were possible, it was just a mental illness.
Relation: contradiction