Premise: It had been found in Mrs. Inglethorp's cheque book, and on being reversed at a mirror, showed clearly the words: " ¦ erything of which I die possessed I leave to my beloved husband Alfred Ing  ¦ " This placed beyond question the fact that the destroyed will had been in favour of the deceased lady's husband.
Hypothesis: It was found on the floor, a few feet away from a cheque book that belonged to Mrs.Inglethorp. 
Label: contradiction