{"id":"1be69255-e295-43b7-87c9-351635c29b92","arxiv_id":"2508.16682","paper_version":1,"verdict":"UNVERDICTED","confidence":"MODERATE","novelty_score":2.0,"correctness_risk":"medium","formal_verification":"none","parameter_count":0,"one_line_summary":"A commentary documents a 'telephone game' in f(Q)-gravity literature, where linear f(Q) cases silently reproduce STEGR/GR results.","lead":"A gravity researcher warns that many recent 'modified gravity' papers with a linear function f(Q) are mathematically the same as general relativity. He lists published examples and asks readers and reviewers to check before treating them as new physics.","discovery_kind":"review","skeptic_critique":{"model":"deepseek-v4-flash","headline":"Central claim rests on an unverified list: the paper asserts each cited f(Q) study used strictly linear f(Q) and exactly reproduced STEGR/GR, but gives no equations, quotes, or derivations to substantiate the per-paper reduction.","rationale":"The reader's verdict of UNVERDICTED already captures the central issue: the mathematical equivalence is standard, but the paper's empirical breadth claim—that each cited study used a linear f(Q) and exactly reproduced STEGR/GR results—is asserted rather than proven. My stress test identifies the same load-bearing assumption as the weakest point and agrees that the lack of per-paper verification prevents the central claim from being fully accepted. Because this concern does not move the verdict from UNVERDICTED, I recommend UNCHANGED.","tokens_in":2848,"tokens_out":7912,"duration_ms":98539,"concrete_test":"Perform a two-column audit of the cited works, starting with [4] and [5]: quote the exact f(Q) ansatz from each paper, write out the resulting metric and connection field equations, and verify algebraically that they reduce to Einstein equations (or to [6]'s system) when f(Q)=β0Q+β1. Also search each paper for any explicit acknowledgment of the STEGR/GR equivalence. If all key citations pass, the central claim is verified; if any ansatz is not exactly linear or the equations do not reduce, the claim needs to be weakened accordingly.","verdict_should_be":"UNCHANGED","load_bearing_attack":"The mathematical identity Q = R + B_Q is standard and the theoretical core is sound; linear f(Q) does reduce to STEGR/GR in the usual variational sense. The load-bearing weakness is empirical: the paper's central claim that 'several studies' in [4]-[10], [12]-[19] unknowingly studied STEGR/GR depends on correctly characterizing each cited work's ansatz and on showing that its field equations and solutions match those of GR or of [6]. None of this is demonstrated. For example, reference [4] is asserted to use f(Q)=β0Q+β1, and reference [5] is asserted to recover the analysis of [6], but the paper displays no field equations from either work, quotes no acknowledgement or omission thereof, and does not check whether the connection variation leaves any residual constraints in the specific settings. If even one flagship example uses a different f(Q) in part of the analysis, imposes extra assumptions, or explicitly acknowledges the STEGR/GR equivalence, the 'telephone game' generalization would need to be weakened. The author's caveat that the list is not exhaustive limits scope but does not verify the cited cases.","agreement_with_reader":"agree"},"referee_report":{"model":"deepseek-v4-flash","summary":"This commentary argues that a number of recent f(Q)-gravity papers, by taking f(Q) to be a linear function, are actually studying STEGR/GR rather than a modified theory of gravity. The author invokes the standard identity Q = R + B_Q, where B_Q is a boundary term, and notes that a boundary term does not affect the equations of motion. Several references are listed as examples of this 'telephone game' effect, in which the equivalence to GR is not acknowledged. The paper contains no new derivations; it is a literature-level critique aimed at authors and reviewers.","tokens_in":3065,"tokens_out":6782,"duration_ms":80955,"significance":"If substantiated, the paper identifies a real and important problem in the f(Q) literature: a subset of papers present results obtained from a linear model as modified-gravity predictions, when in fact they are GR/STEGR results. This has implications for the interpretation of those results and for the peer-review process. The theoretical equivalence Q = R + B_Q is standard and the author cites the relevant sources. The paper's value lies in its warning and in the specific list of references; however, the persuasiveness of the central claim depends entirely on whether each cited work indeed uses a strictly linear f(Q) and exactly reproduces GR/STEGR results, and this is not demonstrated in the manuscript.","major_comments":[{"comment":"The central claim that '[4]' and '[5]' (and by extension the other cited works) use a strictly linear f(Q) and therefore unknowingly study STEGR/GR is asserted without per-paper evidence. No field equations, f(Q) ansatz, or connection gauge from [4] or [5] is displayed, and the specific GR/STEGR result that is 'reproduced' is not identified. Since the whole argument rests on the correctness of these characterizations, please provide a table or appendix with, for each cited paper, the explicit action, the connection treatment, and the point-by-point mapping to GR/STEGR (e.g., which solution of [6] is recovered in [5]). Without this, the 'several studies' generalization is unverifiable.","section":"Main text, paragraph on refs [4]-[10]"},{"comment":"The statement that [5] 'recovered the analysis presented decades ago in [6]' needs substantiation beyond the fact that both treat spherically symmetric anisotropic stars. Reference [6] is a 1975 GR paper; the manuscript must show that the equations of motion in [5] reduce exactly to the Krori-Barua system, with the same metric ansatz and boundary conditions, and not merely a similar solution. Please specify which results are identical and how the boundary-term equivalence operates in the presence of matter.","section":"Main text, paragraph on [5] vs [6]"},{"comment":"For the f(Q,B_Q) papers [17]-[19], the reduction to f(Q) or STEGR is asserted but not demonstrated. In particular, a linear dependence on B_Q may remove the extra scalar degree of freedom, but this depends on the full action and the connection variation. Please show the actions of [17]-[19] and verify that the claimed reduction holds exactly in each case.","section":"Main text, paragraph on [17]-[19]"}],"minor_comments":[{"comment":"The phrase 'have research investigated' is ungrammatical and should read 'have investigated'.","section":"Abstract"},{"comment":"The boundary-term relations T=R+B_T and Q=R+B_Q are stated without defining B_T and B_Q. Give explicit expressions or a precise reference so the reader can see what is meant by 'topological boundary term'.","section":"Main text, Eq. (2)"},{"comment":"The statement that 'some of the journals publishing the aforementioned studies have been informed of this remark' is unverifiable and not relevant to the scientific argument; it should be removed or rephrased.","section":"Main text, final paragraph"},{"comment":"The list of references is explicitly not exhaustive, but the author should justify the selection criteria. Without this, the reader cannot tell whether the examples are representative or cherry-picked.","section":"References"},{"comment":"The phrase 'only the last weeks a linear function f(Q) was introduced in various of studies' is awkward and unclear; please rephrase to specify the time window and the exact claim.","section":"Main text, paragraph on refs [7]-[10]"}],"recommendation":"major_revision","confidential_remarks":"This is a timely commentary with a sound theoretical core. The main risk is that the author's characterizations of individual papers are contested; if the author can supply the requested per-paper table, the paper would be a useful resource. If the details cannot be provided, the claim should be narrowed to the examples that can be verified."},"author_rebuttal":null,"desk_editor":{"model":"deepseek-v4-flash","letter":"The useful core is the math, not the commentary: Q = R + B_Q, so a linear f(Q) = b0 Q + b1 is GR/STEGR up to a boundary term. That's textbook and the author states it plainly. The genuinely new part is the claim that a string of recent f(Q) papers accidentally studied this linear case and reproduced old GR results without noticing. That claim is plausible and worth making, but the paper does not actually make the case for any individual paper. It gives no field equations from [4] or [5], no quotes, no check of whether those authors acknowledged the equivalence, and no analysis of whether the connection variation in those specific models leaves any residual constraints. The list is labeled non-exhaustive, which limits the scope, but it does not verify the examples. If even one flagship case uses a different f(Q) or explicitly mentions the equivalence, the generalization has to be weakened. So the bookkeeping is soft where it matters most.\n\nWhat the paper earns credit for: it is short, clear, and honest about its own limitations. The author correctly observes that reviewers and journals share responsibility for letting this kind of duplication through. The boundary-term relations are standard, and the warning to readers is sensible. It is a commentary, not a research result, and it should be evaluated as such.\n\nWhere I would push back: the rhetorical framing is doing work the evidence doesn't support. Saying the information was \"lost\" because of a \"telephone game\" implies a causal chain of miscommunication, but the paper only shows a few examples that may or may not fit. It also doesn't engage with the possibility that some of the cited papers are using a linear f(Q) as a test case while also discussing nonlinear forms. That's a common pattern in the literature and would make the accusation too broad.\n\nWho is this for? Someone working in f(Q) gravity who wants a cautionary reminder, and editors/reviewers in that subfield. I would not cite it in my own work, but I might mention it as a comment. It deserves peer review only on the condition that the referee demands the author substantiate each cited case with actual equations from those papers. Without that, it's a blog post, not a publishable accusation.\n\nRecommendation: if this crosses an editor's desk, send it to a referee who knows the f(Q) literature well, and ask the author to replace assertion with demonstration. If the author refuses, desk reject.","headline":"A short, correct reminder that linear f(Q) is just STEGR/GR, but the paper's list of offending papers is asserted, not demonstrated.","tokens_in":3528,"tokens_out":2136,"would_cite":false,"duration_ms":29619,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"deepseek-v4-flash","headline":"Several published f(Q)-gravity studies choose a linear f(Q) and thereby quietly re-derive GR/STEGR results without acknowledging the equivalence.","keywords":["modified gravity","symmetric teleparallel","trinity of gravity","f(Q) gravity","STEGR","boundary terms","GR equivalence","telephone game"],"falsifier":"Take any cited paper, such as the compact-star study [5], and write out its full field equations for f(Q)=β0Q+β1, including the connection (teleparallel) variation. If the resulting system has extra independent equations beyond Einstein's field equations, or if the reported metric is not a solution of GR, the claim that the paper silently reduced to GR fails. A direct way to test: check whether the solution in [5] is exactly the Krori-Barua metric from [6]; if it differs in any physical prediction, the equivalence claim for that case is wrong.","tokens_in":2709,"feed_emoji":"📞","tokens_out":7376,"duration_ms":69891,"temperature":0.7,"pith_summary":"The paper argues that a basic fact from the 'trinity of gravity' — that the nonmetricity scalar Q differs from the Ricci scalar R only by a boundary term — has been lost in parts of the recent f(Q)-gravity literature. Several studies pick the linear form f(Q)=β0Q+β1, which makes the theory identical to Symmetric Teleparallel Equivalent General Relativity (STEGR) and hence to general relativity. Their results are therefore not new modified-gravity results but re-derivations of Einstein's equations, often without acknowledging the equivalence. The author compares this to the 'Telephone Game,' where information gets distorted as it passes from paper to paper, and asks readers and reviewers to check for this silent reduction.","feed_headline":"Linear f(Q) gravity papers are quietly reproducing general relativity","feed_subtitle":"With f(Q)=β0Q+β1 the theory reduces to STEGR/GR, so claimed new solutions may be old Einstein results.","key_machinery":"The trinity-of-gravity identities T=R+B_T and Q=R+B_Q, combined with the variational principle that boundary terms do not affect the equations of motion. These identities turn 'linear f(Q)' into a silent switch back to STEGR/GR: any study that assumes f(Q)=β0Q+β1 is testing Einstein's equations, not a modified theory. The paper uses this equivalence as a diagnostic, checking the assumed form of f(Q) in published studies.","core_discovery":"In the paper's own terms, the three gravitational scalars R, T, and Q come from the three components of a generic connection — Levi-Civita, antisymmetric, and nonmetricity — and are related by T=R+B_T and Q=R+B_Q, where B_T and B_Q are topological boundary terms. Since a boundary term in the action does not change the Euler-Lagrange equations, a theory based on a linear f(Q) is dynamically indistinguishable from STEGR, which is equivalent to GR. The paper identifies a series of recent publications in f(Q)-gravity that adopt f(Q)=β0Q+β1 and therefore reproduce STEGR/GR results, including one that recovers an analytic solution found decades earlier in GR. The point is that these works are pres","pith_inferences":["The pattern likely extends beyond f(Q) to any modified-gravity action linear in a boundary-term-connected scalar; the author hints at T and B_T but does not enumerate examples.","The reduction is local and classical; if boundary terms were ever shown to affect observable quantities through boundary conditions or quantum effects, the blanket equivalence would need qualification.","A simple editorial check — flagging any paper whose f(Q) ansatz is linear and whose abstract claims modified gravity — could catch most of these cases before publication.","The telephone-game metaphor implies the problem is self-reinforcing: later papers cite earlier linear-f(Q) works as if they were genuine modified-gravity results, further obscuring the equivalence."],"forward_implications":["Any solution or physical prediction in the cited linear-f(Q) papers is already contained in the GR/STEGR literature, often from decades earlier.","Readers of f(Q)-gravity papers should first inspect the assumed f(Q); a linear choice means the theory is STEGR/GR and should be labeled as such.","Reviewers carry part of the responsibility: requiring authors to state when f(Q) is linear could end the telephone-game effect.","The same caution applies to f(Q,B_Q) studies where a linear dependence on B_Q collapses the theory back to f(Q) gravity, and a linear dependence on both scalars collapses it to STEGR.","Some journals have already been informed of this issue, but not all have acted on it, so community-level vigilance may be needed."],"supporting_citations":[{"why":"Supplies the trinity-of-gravity equivalence Q=R+B_Q and T=R+B_T that makes linear f(Q) reduce to GR.","marker":"[2]"},{"why":"Defines STEGR as the symmetric teleparallel equivalent of GR, the theory that linear f(Q) reproduces.","marker":"[20]"},{"why":"A recent f(Q) paper that assumes linear f(Q) and thereby, per the author, reproduces STEGR/GR results.","marker":"[4]"},{"why":"A recent compact-object f(Q) paper that uses linear f(Q) and recovers the Krori-Barua GR solution.","marker":"[5]"},{"why":"The decades-old GR solution that [5] reproduces, used as evidence that the result is not new.","marker":"[6]"},{"why":"Example of an f(Q,B_Q) study whose linear dependence on B_Q collapses the model to f(Q) or STEGR.","marker":"[17]"}],"fun_headline_variants":["Gravity's telephone game: f(Q) papers replay Einstein","Lost equivalence: linear f(Q) gravity is just GR","Modern gravity papers rediscover Einstein's results","The Trinity of Gravity: one theory, three names, forgotten","f(Q) studies rederive GR without citing it"],"cache_read_input_tokens":2688,"weakest_assumption_plain":"The argument depends on the assumption that every cited paper actually uses a linear f(Q) and that its field equations exactly match STEGR/GR in the spacetimes considered, not merely approximate or similar results.","fun_headline_variants_meta":{"raw":{"variants":["Gravity's telephone game: f(Q) papers replay Einstein","Lost equivalence: linear f(Q) gravity is just GR","Modern gravity papers rediscover Einstein's results","The Trinity of Gravity: one theory, three names, forgotten","f(Q) studies rederive GR without citing it"]},"model":"deepseek-v4-flash","effort":"low","cost_usd":0.000167,"raw_usage":{"total_tokens":1031,"prompt_tokens":621,"completion_tokens":410,"prompt_tokens_details":{"cached_tokens":256},"prompt_cache_hit_tokens":256,"prompt_cache_miss_tokens":365,"completion_tokens_details":{"reasoning_tokens":345}},"tokens_in":365,"tokens_out":410,"duration_ms":4941,"temperature":1.0,"reasoning_tokens":345,"cache_read_input_tokens":256,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-08-05T17:43:14.328559+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":"Take any cited paper, such as the compact-star study [5], and write out its full field equations for f(Q)=β0Q+β1, including the connection (teleparallel) variation. If the resulting system has extra independent equations beyond Einstein's field equations, or if the reported metric is not a solution of GR, the claim that the paper silently reduced to GR fails. A direct way to test: check whether the solution in [5] is exactly the Krori-Barua metric from [6]; if it differs in any physical prediction, the equivalence claim for that case is wrong.","supporting_citations":[{"cited_title":"Jimenez, L","cited_arxiv_id":null,"evidence_quote":"Supplies the trinity-of-gravity equivalence Q=R+B_Q and T=R+B_T that makes linear f(Q) reduce to GR."},{"cited_title":null,"cited_arxiv_id":null,"evidence_quote":"Defines STEGR as the symmetric teleparallel equivalent of GR, the theory that linear f(Q) reproduces."},{"cited_title":"Albalahi, A","cited_arxiv_id":null,"evidence_quote":"A recent f(Q) paper that assumes linear f(Q) and thereby, per the author, reproduces STEGR/GR results."},{"cited_title":"Bhattacharjee and P.K","cited_arxiv_id":null,"evidence_quote":"A recent compact-object f(Q) paper that uses linear f(Q) and recovers the Krori-Barua GR solution."},{"cited_title":"Krori, J","cited_arxiv_id":null,"evidence_quote":"The decades-old GR solution that [5] reproduces, used as evidence that the result is not new."},{"cited_title":"Bhoyar and Y.B","cited_arxiv_id":null,"evidence_quote":"Example of an f(Q,B_Q) study whose linear dependence on B_Q collapses the model to f(Q) or STEGR."}],"review_version":1}