What If Physics IS NOT Describing Reality?

Quantum mechanics’ “weirdness” becomes easier to interpret if physics is treated as a model of information rather than a direct map of reality. Neils Bohr’s distinction—physics concerns what can be said about nature—sets up the core claim: the mathematical laws of physics may describe patterns in observations and knowledge, not the underlying world itself. Werner Heisenberg sharpened that view by saying quantum laws deal with what can be known about elementary particles, not the particles “themselves.” From there, the discussion moves to informational interpretations, including John Archibald Wheeler’s provocative “it from bit,” where information is treated as the most fundamental ingredient and physical behavior emerges from the relationship between observer and observed (with “observer” not necessarily meaning conscious).

Anton Zeilinger’s approach makes the idea concrete by rebuilding quantum systems out of informational building blocks. Instead of starting with particles and fields as the smallest pieces of reality, Zeilinger treats a quantum system as a collection of propositions—answers to questions that could be asked about it. The most elementary proposition is a binary one: a yes-no answer, or one bit. With that rule, quantum indeterminacy stops looking mysterious. Take quantum spin: an electron prepared “spin up” relative to a Stern–Gerlach apparatus contains one bit of information—up versus down along that measurement axis. Rotate the apparatus by 90 degrees and the “left-right” orientation is no longer defined; it becomes a superposition that yields random outcomes when measured. The bit of information is effectively “used up” to answer the first question, so asking a complementary question forces the previously defined property to become undefined.

Entanglement follows the same logic. Two electrons can be prepared so their spins are opposite relative to a chosen direction. If each electron can carry only one bit, that bit is not stored locally as a complete set of independent answers. Instead, the information is distributed across the pair: measuring one electron’s spin relative to a Stern–Gerlach device determines the other’s outcome as well. The correlations look instantaneous across distance, producing the familiar “spooky action” impression—but in this informational framing, the effect arises because the shared bit is distributed non-locally and becomes defined only when a particular question is asked.

The uncertainty principle also fits. Beyond the usual measurement-error form, information-theoretic methods yield entropic uncertainty, using Shannon entropy as a measure of how many binary questions are needed to extract a system’s information. That framework has been used to interpret wave–particle duality in Wheeler’s delayed-choice experiment: the wavefunction can supply answers to one of two complementary questions (which path or phase/interference), but not both at once, because its finite information content cannot support simultaneous certainty.

The discussion ends by confronting the “whose information?” problem. If the wavefunction is not an observer-independent object but a representation of knowledge, then claims about reality without observers become untestable. The payoff is interpretive: many quantum oddities align with the idea that direct experience is structured by an informational space-time, even if the universe itself likely isn’t a simulation. The transcript then briefly pivots to follow-up comments about Milky Way mergers and stellar collisions, and to a cosmology clarification: expansion of space is not equivalent to matter shrinking because general relativity predicts redshift behavior tied to expanding space, and shrinking would imply different astrophysical outcomes (like the nonexistence of “pygmy mammoths”).