It is not the key, but it will open it at a pinch." He slid back the roll top, and ran a rapid eye over the neatly filed papers. 
The papers contained the answer to the puzzle.
mnli hypothesis: The papers contained the answer to the puzzle. premise: It is not the key, but it will open it at a pinch." He slid back the roll top, and ran a rapid eye over the neatly filed papers. 