Luchesi is a kind of insurance for Montresor. He brings Luchesi up whenever he wants to keep Fortunato distracted – like right before he “fetter[s] him to the granite.” But again, Montresor doesn’t really need to evoke the name of Luchesi. Fortunato is not only drunk, but also willing to do anything to get to the Amontillado.
Luchesi is a plot device, used to helo drive the action. He is the rival of Fortunato in wine tasting. He is an insurance of Montesor because he knows that Fortunato is willing to do whatever it takes to get to the Amontillado.
Inference simply means a conclusion that we can reach based on the evidence that we've.
Since the details from the text states that The crocodile wept and begged that it should be allowed to stay and that the doctor didn't have the heart to turn him out.
This shows that the doctor felt sorry fur the sad crocodile and couldn't turn him out.
