My sister's friend told her this story:
Arlene and her DH have a "butterfly garden" planted in their yard, on which they spend a lot of time and effort. Their neighbor, Eva, has a problem with the garden for some reason. The other day, Eva, comes to their door and has the following conversation with Arlene:
Eva: "You need to come clean up after your butterfly. One of them has pooped on my window."
Arlene: "How do you know it was a butterfly or that it's mine?"
Eva: "I saw it poop! You have a butterfly garden, so it must be yours! Get over here and clean that nasty stuff off my window, NOW!"
Arlene: "Nope, I won't be doing that."
I guess the question is: Is Arlene responsible for cleaning butterfly poop off a neighbor's window?