Can a person’s acts of service to others erase a poor decision he or she has made in the past?
Talk about the motive behind the murders of all the guests—which then might lead you into a discussion of legal justice vs. philosophical justice. Each of the guests is guilty of a crime, but not one that could be prosecuted in a court of law. Does each receive his/her just deserts? In other words, has true justice been accomplished by the end of the novel? Is the murderer insane as all the guests claim? Or is he/she acting with clear-headed logic and rationality?
These questions goes along with the book "And Then There Were None" by Agatha Christie.

When lawrence saw the posters for the circus hanging on the bulletin board, as he swept up the trimmings at slim's barbershop, he knew he would be taking his little cousins. they loved animals, and he was looking forward to seeing the smiles on their faces as the circus performers amazed them with their stunts. but sweeping up hair clippings didn't pay a whole lot. lawrence spent 45 dollars just getting tickets. but it was worth it to see his cousins' faces. the day finally came and everyone was excited as they walked into that big circus tent. but lawrence soon realized that he and his cousins would be thirsty and hungry. as they sat in their seats, the drink vendor walked by selling beverages. desperately thirsty, lawrence asked him how much a lemonade would cost, and the drink vendor said, "eleven dollars each." lawrence replied, "oh, that's it? just eleven dollars? what a great deal for one cup of lemonade. that's totally worth it." the drink vendor walked away. which type of irony is used?