Anyway, Tuppence decided, with her usual shake of the shoulders, it was worth trying, and try it she would.
After Tuppence decided it wasn't worth trying, she shrugged her shoulders.
mnli hypothesis: After Tuppence decided it wasn't worth trying, she shrugged her shoulders. premise: Anyway, Tuppence decided, with her usual shake of the shoulders, it was worth trying, and try it she would.