Believe me, Miss Howard, said Poirot very earnestly, "if Mr. Inglethorp is the man, he shall not escape me. 
Poirot didn't care and said nothing.
mnli hypothesis: Poirot didn't care and said nothing. premise: Believe me, Miss Howard, said Poirot very earnestly, "if Mr. Inglethorp is the man, he shall not escape me. 