Not that she disbelieved in Tommy, but occasionally she was shaken with doubts as to whether anyone so simple and honest as he was could ever be a match for the fiendish subtlety of the arch-criminal.
She knew how the arch-criminal was well trained for this, and how Tommy wasn't.
mnli hypothesis: She knew how the arch-criminal was well trained for this, and how Tommy wasn't. premise: Not that she disbelieved in Tommy, but occasionally she was shaken with doubts as to whether anyone so simple and honest as he was could ever be a match for the fiendish subtlety of the arch-criminal.