The earliest origin of the phrase "Is the person on the other side of the Internet a person or a dog?" is unknown, but this statement is widely circulated on the Internet and is often used to discuss identity issues in online chats.

In online chats, people often don’t know the other person’s true identity, so this term has become a way to describe this state. At the same time, this statement can also be used to describe the anonymity and virtuality on the Internet, because in this environment, people can hide their true identity and show a behavior and language characteristics that are different from those in real life.

In addition, this term can also be used to describe deception and fraud in online chats, because these behaviors often involve deceiving the identity of the other party. In general, the saying "Is the person on the other side of the Internet a person or a dog?" has become a classic saying in Internet culture and is widely used in various situations.