Luckily for Mr. Inglethorp, he had been able to produce an unimpeachable alibi. 
Inglethorp was a shrewd man, with lying being one of his specialties.
mnli hypothesis: Inglethorp was a shrewd man, with lying being one of his specialties. premise: Luckily for Mr. Inglethorp, he had been able to produce an unimpeachable alibi. 