Elon Musk has once again sparked discussion around simulation theory after responding to a post linking quantum physics concepts to the idea that reality may “render” itself only when observed.
In a post shared on X (formerly Twitter) on March 21, 2026, Elon Musk described a conversation he once had with a physicist and a computer scientist about whether humans are living in a simulation. According to Musk, the two experts gave opposite answers, one saying the probability was 0%, the other 100%.
He compared the exchange to a quantum physics phenomenon, writing that “it was like a double-slit experiment, but with humans.”
More on what Elon Musk said about the double-slit experiment
The discussion referenced by Elon Musk builds on the well-known double-slit experiment, a foundational concept in quantum mechanics. As explained by Discovery on August 1, 2019, the experiment demonstrates that light behaves both as a wave and a particle.
When light passes through two slits, it creates an interference pattern consistent with wave behavior. However, when scientists attempt to observe which slit the particles pass through, the pattern disappears, and the light behaves like individual particles instead.
This outcome suggests that observation itself affects physical behavior. Scientists have interpreted this to mean that particles exist in multiple possible states, known as superposition, until they are measured. The act of observation appears to “collapse” those possibilities into a single outcome.
It is this concept that has often been used in popular discussions about whether reality depends on perception, a theme echoed in the post Musk responded to.
Simulation theory resurfaces in online discourse
The original post that prompted Elon Musk’s response connected the double-slit experiment to simulation theory, the idea that reality might function similarly to a video game, rendering details only when observed.
While this interpretation is not a scientific consensus, it has gained traction in online communities and philosophical discussions. The analogy suggests that, just as a game engine conserves resources by rendering only what a player sees, reality could operate similarly.
Elon Musk’s anecdote added another layer to the discussion by highlighting how even experts can arrive at radically different conclusions about the nature of reality.
Elon Musk faces separate legal scrutiny over past social media conduct
Elon Musk’s latest comments come amid ongoing legal and financial scrutiny tied to his past use of social media. According to the Associated Press on March 20, 2026, a jury in San Francisco found him liable for misleading investors during his 2022 acquisition of Twitter, now known as X.
The case reportedly centered on whether public statements made by the Tesla and SpaceX chief, including tweets suggesting the deal was “on hold”, influenced the company’s stock price.
Jurors concluded that two of tech billionaire’s tweets misled investors, though they did not find evidence of a deliberate scheme to defraud. The verdict followed nearly three weeks of trial proceedings and several days of deliberation. Shareholders were awarded damages estimated at billions of dollars, reflecting losses incurred during fluctuations in Twitter’s stock price.
Musk’s legal team has indicated plans to appeal, describing the outcome as a partial setback rather than a final judgment. According to AP, the case highlights the broader implications of high-profile figures using social media to comment on business dealings, with legal experts noting that such statements can have significant market consequences
Edited by Devangee Halder
