From your account, there are only two people whom we can positively say did not go near the coffee ”Mrs. Cavendish, and Mademoiselle Cynthia."
There is a chance that someone else did it.
mnli hypothesis: There is a chance that someone else did it. premise: From your account, there are only two people whom we can positively say did not go near the coffee ”Mrs. Cavendish, and Mademoiselle Cynthia."