I'm in the "Epstein files." Here is the story.

A 2010 email from Lee Smolen to Jeffrey Epstein—later surfaced in the “Epstein files”—details a high-level physics pitch about “doubly special relativity” (DSR), a quantum-gravity-inspired tweak to Einstein’s special relativity. The message matters less because it links Epstein to science and more because it captures a long-running dispute in theoretical physics: whether DSR offers a credible, testable route to quantum-gravity effects—or whether it devolves into mathematically contrived “fixes” that erase any observable predictions.

Smolen’s email frames DSR as a way to preserve a minimal length scale, often associated with quantum gravity near the Planck scale. In this setup, spacetime intervals at the Planck length or time supposedly do not contract or dilate, leading to a testable consequence: the speed of light would depend on energy. Smolen says he has “succeeded” in addressing a critique attributed to Sabine Hossenfelder, claiming there are “non-localities” in DSR so severe they would already rule it out. He adds that the attached papers include a “cosmological consequence” involving how far apart two clocks can be and still remain synchronized, and he notes an upcoming conference in Copenhagen where Hossenfelder is scheduled to give a slot to explain why she believes the approach is wrong.

Hossenfelder’s account of why her name appears in the inbox is grounded in context: Epstein had a documented interest in science, particularly physics foundations, and she says she knew people who knew him and had heard he might fund research like hers. She emphasizes she never met Epstein and did not follow the Epstein story closely, but the resurfacing of her name still “hits hard,” given the broader allegations around Epstein.

The core of Hossenfelder’s anger, however, is scientific. She argues that DSR’s attempt to incorporate a minimal length forces a conceptual collapse: if special relativity is deformed in the way Smolen describes, “you have to give up space-time entirely,” making the notion of “what a point is” ill-defined. She says her work was published in Physical Review Letters (PRL), prompting comments and replies on the arXiv, and that Smolen and others eventually produced a “fix”—but one that removed the observable effects, effectively restoring special relativity in a confusing form. In her view, this is not a genuine resolution but a “pointless theory fudging,” where wishful thinking is converted into formalism that does not track nature.

She also challenges the premise that a minimal length scale automatically requires DSR. Minimal length in quantum-gravity approaches may refer to an invariant quantity not equal to a literal spatial distance that would be subject to length contraction. She cites curvature as an example: quantities like spacetime curvature scale as inverse length squared and can reach Planck-scale values without implying a special-relativistic distance that must remain invariant.

Finally, Hossenfelder links the DSR dispute to a broader pattern in her career. She says she previously concluded that “tiny black holes” at the Large Hadron Collider were based on logically flawed arguments, stopped working on LHC phenomenology, and later turned to quantum-gravity tests—only to encounter a similar cycle of low-quality reasoning and unfulfilled promises. Her takeaway is blunt: she believes cognitive bias and sloppy logic repeatedly derail attempts to connect quantum gravity to evidence, and she frames her move to YouTube as a bid for more honest discussion outside the usual academic incentives.