A woman walks up to a librarian and asks, “Do you have the book on Pavlov’s dogs and Schrödinger’s cat?”

The librarian replies, “It rings a bell, but I don’t know if it’s here or not.”

@Wrewdison is that the book that says you can save money on dog food by putting pavlov's bell in the box with schrodinger's cat?

so the dogs never know if they are hungry or not