Premise: But if you are sure that you have enjoyed to the full the reaction of joy after despair with which I have kindly provided you free of charge, let us get down to our mail, as the saying goes." Tuppence snatched the two precious envelopes from him unceremoniously, and scrutinized them carefully.

Hypothesis: He ran off with the valued envelopes before Tuppence was able to look at them closely.
Relation: contradiction