Premise: "Now, if it had been lost and recovered, Mrs. Inglethorp would at once have replaced it on her bunch; but on her bunch I found what was obviously the duplicate key, very new and bright, which led me to the hypothesis that somebody else had inserted the original key in the lock of the despatch-case."" If this premise is true, what does that tell us about whether it entails the hypothesis "Since she had to put a new key on her bunch, it was obvious that someone had stolen the old one."?
it is not possible to tell