Explain SMBC — the wiki for Saturday Morning Breakfast Cereal

The Joke

The comic uses a "walks into a bar" joke structure to explore the philosophical problem of free will versus determinism. A human and a perfect simulation of that human walk into a bar. The human confidently declares she has free will and orders a beer. The simulation then says that since it is identical to the human, it must necessarily say the same thing -- "I have free will. May I have a beer" -- because that is what a perfect copy of the human would do.

The implication is devastating: if a deterministic simulation, which by definition has no free will, produces the exact same behavior and the exact same claim of having free will, then the human's own assertion of free will is undermined. The human cannot distinguish her own experience from that of a deterministic copy. In the final panel, the human reconsiders her notion of free will and changes her order to a shot -- she needs something stronger after this existential crisis.

The Humor

The comedy comes from packaging a genuinely challenging philosophical argument into the lightest possible format -- a bar joke. The simulation's logic is airtight and uncomfortable: if it is truly identical to the human, it will say and believe everything the human does, including believing it has free will. This means the human's subjective feeling of free will is not evidence of actually having it. The punchline -- upgrading from beer to a shot -- is a classic comedic deflection, using alcohol as the universal response to existential dread.

References

This comic engages with the philosophical zombie (p-zombie) thought experiment and the broader debate between free will and determinism. The simulation argument echoes ideas from thinkers like Daniel Dennett and Nick Bostrom. The core question -- whether a perfect simulation of a mind would be conscious and have free will -- is central to philosophy of mind and is related to debates about functionalism, the Chinese Room argument, and computational theories of consciousness. This is the third in a series of SMBC comics exploring free will (hence "free-will-3").