Lahav’s Relativistic Theory
Physicist Nir Lahav characterizes consciousness as a physical phenomenon that is relative to the measurements of a “cognitive frame of reference.”
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Nir Lahav
Physicist & Neuroscientist
Nir Lahav is a physicist and consciousness researcher known for developing the Relativistic Theory of Consciousness. He holds a PhD from Bar-Ilan University and is a postdoctoral researcher at Cambridge University, where he combines physics, neuroscience, and EEG data to study the nature of conscious experience.
Key Takeaways
Core Claim
Consciousness is a physical phenomenon, but its appearance depends on the observer’s cognitive frame of reference.
How It Works
Like motion in physics, consciousness manifests differently depending on whether you're inside or outside the system.
Distinguishing Idea
First-person and third-person views aren’t opposites—they’re different measurements of the same underlying process.
Implications
Zombies are impossible, and consciousness could emerge in AI if the right relational structure exists.
Bridges the Gap
Translates subjective experience into third-person science via cognitive frame transformations.
Lahav’s Relativistic Theory
Physicist Nir Lahav notes that any scientific theory of consciousness must ultimately refer to phenomenal features and solve the hard problem, and that the explanatory gap hints that neuroscience alone cannot do it. Instead, he suggests that another layer of physical explanation is needed. To achieve this, he says, we need to extend the principle of relativity to also include emergent properties and consciousness. Accordingly, consciousness is not absolute but a physical phenomenon that depends on the measurements of a cognitive frame of reference (Lahav, 2025a, 2025b).
Just as different observers can have different measurements of velocity in a relativistic context, Lahav argues that the same is true for consciousness. Bob measures that he has consciousness, while Alice measures that he doesn't because they are in different cognitive frames. Lahav argues that the principle of relativity gives rise to relationalism—the existence of natural properties depends on the relations that are measured in a reference frame. (For example, in Einstein's equivalence principle, the relations measured by an observer inside an accelerating spaceship will manifest gravity, while the relations measured by an observer outside will manifest acceleration).
The same is true for consciousness, Lahav claims; first- and third-person perspectives are just two different frames of reference. The relations between specific representations (named phenomenal judgement-representations) measured inside the brain manifest consciousness, while the same representations measured by an outside observer will manifest neural dynamics. This is because from the outside we use sensory apparatus like our eyes to measure the environment, but inside the brain, the measurements of these representations are not by sensory apparatus but by the interactions between the representations.
These different kinds of measurements manifest different kinds of physical properties. This leads to different manifestations of conscious experience and brain activity in first-person and third-person cognitive frames of reference. Now consciousness is not private anymore, and there exists a transformation between these cognitive frames. According to this framework, philosophical zombies cannot exist, and AI consciousness is possible (Lahav & Neemeh, 2022).
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