Reality+: Are Virtual Worlds Real?

Having spent decades arguing that consciousness is more than the physical, David Chalmers turned, in his 2022 book Reality+, to a different and increasingly urgent question: as more of life moves into virtual and simulated worlds, are those worlds real — or merely elaborate fictions? His answer is bracing and counterintuitive. Virtual reality, he argues, is genuine reality.

Virtual realism

The common view, captured in William Gibson's phrase "consensual hallucination," is that a virtual world is fake — a convincing illusion with nothing behind it. Chalmers rejects this. His position, virtual realism, has three parts: virtual objects really exist; events in virtual worlds really happen; and experiences in virtual reality are not illusions. A virtual object — a file, an avatar, a virtual city — is a real digital object: a data structure, a computational process running on real hardware. He grants that a virtual kitten is not a kitten, but insists a virtual world can still be a real environment full of real digital things. The grounding is structuralism: reality is characterized by its causal structure, and a virtual world is simply another way of implementing that structure — not a window onto idealism, but a genuinely existing computational reality.

The simulation is not a deception

This reframes the famous simulation hypothesis — the conjecture that we ourselves might be living inside a computer simulation. For Chalmers this is not a skeptical hypothesis but a metaphysical one: a claim about what reality is ultimately made of, not a claim that we are being deceived. Even if we are in a simulation, he argues, there are still tables and chairs and bodies — they are simply made, at bottom, of bits rather than quarks ("it-from-bit"). Waking up to find we were simulated all along would not mean that nothing is real; it would mean reality has a digital basis one level down. The everyday world keeps all the reality it ever had.

A mirror to the interface

Set beside the other ideas in this section, Reality+ makes a clean and surprising contrast. Donald Hoffman's The Interface Theory of Perception argues that the world we perceive is not the real one — that spacetime and objects are a desktop of icons hiding a deeper reality. Chalmers' virtual realism argues the opposite about virtual worlds: even a simulated world is fully real, made of real bits. One thinker says the familiar world is less real than it seems; the other says the artificial world is more real than it seems. Together they chart the range of serious answers to a single question — is what we interact with real? — and show that taking perception and technology seriously can lead in strikingly different directions.

Sources

Primary sources: David Chalmers, Reality+: Virtual Worlds and the Problems of Philosophy (W. W. Norton, 2022) · "The Virtual and the Real" · "The Matrix as Metaphysics" · and his archive at consc.net.