그것은 아주 청결했다, 그리고 그는 방 문을 열어됐다고 기억 그의 연구에서 내려와, 그 때 결과적으로 그는 핸들을 건드리지 않았습니다
It was quite clean, and then he remembered that the door of his room had been open when he came down from his study, and that consequently he had not touched the handle at all.QED QED