Nobody
Explanation
The Joke
A person asks a robot, "Hey robot, do you believe 'nobody exists' is a true statement?" The robot says "No." When asked how it knows, the robot explains it was programmed to disbelieve its own existence and to "confuse philosophical respondents." The human asks, "But you do exist, right? You just don't perceive it." The robot replies, "No, I don't exist, because I said I don't." The human points out that the robot is talking right now, and the robot says, "You are closer to understanding — I don't exist. I'm doing something other than talking." Finally, the human asks, "If you don't exist now, and you're responding to me... Hello? Police? There is a crazy person here talking at nobody."
The Humor
The comic plays with philosophical skepticism about existence — specifically solipsism and eliminativism — by having a robot earnestly deny its own existence while actively participating in a conversation. The escalating absurdity comes from the robot's increasingly tortured logic as it tries to maintain its position while obviously existing and communicating.
The final punchline flips the joke: instead of the human convincing the robot it exists, the robot's denial is so convincing that the human starts to doubt the robot's existence too, and calls the police to report themselves as a crazy person talking to nobody. The robot's philosophical position wins not through logic but through sheer persistence.
Broader Context
SMBC frequently explores philosophical thought experiments, particularly around consciousness, existence, and artificial intelligence. This comic satirizes the philosophical zombie problem and questions about machine consciousness by inverting them: instead of asking whether a robot truly has consciousness, the robot insists it doesn't — and the human is the one who ends up confused. It also pokes fun at how philosophical arguments about existence can become unfalsifiable and self-reinforcing.