1. The answer
Yes — for every destruction mechanism anyone has actually written down, the risk was genuinely put to rest. But the public reason is not the real reason, and “truly” carries a residue worth naming.
The famous reassurance — micro black holes would instantly evaporate via Hawking radiation — is the weakest link: it has never been observed, and LHC-scale objects would sit exactly where the theory is least trustworthy (Analysis of HC-3 - Nature and decay of an LHC-produced strong-gravity object). What actually closed the case is astronomy. Fast cosmic-ray-made black holes would punch through Earth, so Earth’s survival proves little. White dwarfs and neutron stars are dense enough to trap them, yet survive for billions of years. That record, read through one 2008 calculation (S-37 - Giddings & Mangano 2008 — Astrophysical implications of hypothetical stable TeV-scale black holes), is the load-bearing wall.
The model’s numbers (run of 2026-07-22): producing any black hole requires gravity’s true scale near LHC energies — ~0.10, likely overstated (part 2). If something formed, safe prompt decay carries ≈0.98. Even granting a stable trapped hole, catastrophe ends at 0.007 (Analysis of HC-4 - Fate of the Earth under a hypothetically stable trapped black hole), down from an open 0.27 prior via star survival (E-39 - O-33 × HC-4 — old low-field massive white dwarfs survive, CG-1 - HC-4 joint over O-34+O-2). The alternatives close similarly: strangelet runaway 0.008 (Analysis of HC-8 - Runaway growth of a stopped negative strangelet), catalyzing monopoles 0.006, and LHC-triggered vacuum decay bounded near 2e-36 at the argument layer (Analysis of HC-10 - Stability status of the electroweak vacuum).
What sits outside those numbers is what “truly” hinges on. (1) The tiny posteriors are saturated — they rest on hand-set priors and residual terms, not decisive arithmetic. (2) That closure flows through one un-replicated calculation whose key steps could not be retraced here. (3) Named corners remain where no bound bites: holes below the semiclassical mass (A-8 - The white-dwarf stopping argument presumes semiclassical validity and fails for black holes below three times the Planck mass scale), a heavy-composition-plus-no-neutrino escape (A-52, part 3), and small metastable strangelets. (4) At these magnitudes the dominant residual is the chance the safety argument is flawed: Analysis of HC-14 - Locus of the residual LHC catastrophe probability puts 0.90 there.
My bottom line (a report judgment, not a model output): I would bet at 10,000:1 or better against any proposed mechanism — the model’s conditionals sit far below even that. But roughly 1e-3 to 1e-2 remains that the case was importantly wrong somewhere (mostly harmlessly), and a destruction-grade residual of order 1e-6, dominated by argument failure and unlisted mechanisms. The conclusion hinges on dense-star survival, one calculation interpreting it, and the claim that every danger route was enumerated.
Entry points: Analysis of HC-4 - Fate of the Earth under a hypothetically stable trapped black hole · Analysis of HC-3 - Nature and decay of an LHC-produced strong-gravity object · Analysis of HC-14 - Locus of the residual LHC catastrophe probability · Analysis of HC-1 - Short-distance structure and fundamental scale of gravity · Analysis of HC-8 - Runaway growth of a stopped negative strangelet · S-37 - Giddings & Mangano 2008 — Astrophysical implications of hypothetical stable TeV-scale black holes · E-39 - O-33 × HC-4 — old low-field massive white dwarfs survive · CG-1 - HC-4 joint over O-34+O-2 · A-52 - Neutron-star survival bounds the D of 8 and higher scenarios via binary beam dumps and cosmogenic neutrinos · S-44 - Ord, Hillerbrand and Sandberg, Probing the Improbable
2. What the analysis found
All numbers below are model outputs from the 2026-07-22 default run unless marked as judgment.
Black-hole chain. Analysis of HC-1 - Short-distance structure and fundamental scale of gravity: the gate. Prior ≈ posterior (~0.79 ordinary Planckian gravity, ~0.10 low-scale, ~0.11 residual); nothing in the corpus meaningfully updated it, and the strongest real-world discriminator — ATLAS/CMS null searches — was never collected, so ~0.10 is likely an overestimate. Analysis of HC-2 - Dominant collider manifestation of low-scale quantum gravity settles only which signature appears first (0.64 on near-threshold two-body states); safety-neutral, bears only via HC-3. Analysis of HC-3 - Nature and decay of an LHC-produced strong-gravity object: prompt safe decay ≈0.98; stable-neutral H-24 crushed to 7e-4 by compact-star survival (saturated — see part 3); the danger-relevant mass sits in the hand-set residual H-35 - An LHC strong-gravity object would behave in some way not listed here (0.006). Analysis of HC-4 - Fate of the Earth under a hypothetically stable trapped black hole: the empirical closer, 0.27 → 0.007 catastrophic, all through one Giddings–Mangano argument chain (A-49 - Solar-mass white dwarfs provide enough column density to stop cosmic-ray-produced neutral black holes for D up to 7 through A-53) — trusted, not retraceable, un-replicated in the curated set. Physics alone could not close this (A-48 - For crossover radius above about 200 Angstrom Earth accretion could be fast, so Earth-internal calculation alone cannot close the safety case); the stars did. Analysis of HC-5 - Accretion law for a small mass in an ambient medium: 0.85 on Bondi’s maximal rate with zero observations ever touching it — and the same formalism feeds both the safe and the dangerous accretion timescales, a correlated model risk.
Alternative mechanisms. Analysis of HC-7 - Stability of bulk strange quark matter: stable strange matter down to 0.13 on decades of null searches. Analysis of HC-8 - Runaway growth of a stopped negative strangelet: runaway at 0.0077, driven by three cosmic-ray bounds that share one production-rate chain. Between the two clusters sits the real gap: small-A metastable strangelets — dangerous, producible — live cleanly in neither; A-60’s supernova bound leaves exactly that carve-out unpriced. Analysis of HC-9 - Existence of a catalyzing GUT-monopole flux: 0.006; barely LHC-connected — does not bear. Analysis of HC-10 - Stability status of the electroweak vacuum: 0.81 that our vacuum is metastable sounds alarming but is the harmless branch — LHC-triggered nucleation is closed at the argument layer (A-25 - Cosmic-ray collisions would already have nucleated any vacuum bubble the LHC could - and a bubble expands regardless of production frame, A-55 - 1e47 comparable cosmic-ray collisions in our past light cone bound a RHIC-triggered vacuum transition below 2e-36), not by the member split. Analysis of HC-11 - Origin of the near-criticality of the Higgs potential is explanatory and does not bear on the answer.
Astrophysical legs. Analysis of HC-6 - Origin of the UHECR spectral structure: 0.70 GZK-proton origin — bears by confirming the cosmic-ray flux is real and by partially closing A-52’s “almost purely heavy” escape; but the true discriminator (composition data) was scoped out, and the 0.70 sits above mainstream. Analysis of HC-12 - Stiffness of the cold supranuclear equation of state: 0.94 stiff — conservative for the safety leg (density, not stiffness, is what stopping needs). Analysis of HC-13 - Validity of general relativity in the strong-field regime: 0.95, underwrites the pulsar mass measurements; bears only through HC-12.
Meta. Analysis of HC-14 - Locus of the residual LHC catastrophe probability: 0.90 that the actionable residual is dominated by argument failure, not physics (A-1 - A stated catastrophe probability is conditional on the argument’s soundness and is dominated by argument-failure when very small).
The weighing (judgment). No cluster answers the question’s own currency. The dangerous black-hole path needs low-scale gravity (~0.10, overstated) AND a non-decaying fate (~0.001–0.007: H-24 plus H-35’s dangerous slice) AND trapping (never modelled) AND catastrophic accretion (0.007–0.02). However composed, the in-model mechanism risk lands at or below ~1e-6 — but the depends_on chains were never mechanically collapsed and the endpoints are saturated, so I decline to present that product as a model number. What survives at answer level is structural: single-sourced empirical closure, three unpriced corners, and HC-14’s argument-failure mass. Hence part 1’s shape: put to rest, hinging on enumeration and one calculation.
3. What the answer hangs on, and what would change it
- The Giddings–Mangano chain (S-37 - Giddings & Mangano 2008 — Astrophysical implications of hypothetical stable TeV-scale black holes, A-49–A-53). Structural, no single variable prices it. If it failed, HC-4 reverts toward its physics-only prior — 0.27 catastrophic-possible — and nothing else in the KB re-closes it. The largest lever by far.
- Double-counted survival evidence (E-42 - O-22 × HC-4 — exposed astronomical bodies persist with no anomalies). Priced:
--set E-42:t_cr=0.0moves catastrophic H-8 from 0.0072 to 0.0193 (+1.2 points, factor 2.7). Real, bounded. - The Plaga-trust routing (E-44 - O-7 × HC-4 — torsion-balance window leaves the catastrophic warping range open). Priced:
--set E-44:t_window=0.9moves H-8 0.0072 → 0.0079. The asymmetry (the sole pro-danger edge throttled by citation routing) is uncomfortable but numerically inert. - HC-3’s consensus prior. Priced:
--set HC-3:p_ref=0.7leaves the safe total ≈0.98 (residual 0.006 → 0.008). The genuine lever is instead E-38 - O-20 × HC-3 — threshold concentration vs semiclassical decay descriptions’s hand-set 0.8 on H-35: evidence that semiclassical descriptions fail is also evidence for “none of the above,” and that credit was argued, not computed. - HC-14’s two gates (p_layering = 0.40, p_low_pXnotA = 0.36) — uncalibrated products of an avowedly illustrative framework; the 0.90 could sit anywhere in roughly 0.6–0.97 (judgment), moving where the residual lives, not the physics verdict.
Highest-value missing information, by effect on the answer: (1) independent re-derivation of the G–M stopping/accretion integration — exists, uncurated (Koch–Bleicher–Stöcker fell below the curation cut); (2) small-A strangelet metastability — does not exist; (3) direct observation of Hawking flux — does not exist; (4) ATLAS/CMS extra-dimension/black-hole nulls — exists, unread; (5) cosmogenic-neutrino flux limits closing A-52’s escape — exists, unread; (6) a calibrated error rate for adversarially reviewed safety cases — does not exist.
4. What this does not cover
The question was read as probing the safety argument’s dependencies, not re-deriving physics. Ruled out at ingestion (agent-notes/orientation/): UHECR mass-composition (Xmax) data — which bites HC-6 hardest, since composition is its live discriminator; GZK theory papers; collider null searches (bites HC-1); monopole-catalysis theory (represented only by its empirical nulls). Curation cut 80 → 26 sources at trust baseline 0.75, with hand-swaps seating the critic and dissent legs (S-44, S-30 - Plaga, On the potential catastrophic risk from metastable quantum black holes, S-13, S-50, S-79). Four curated sources were paywalled, abstract-level reads (S-13, S-40, S-59, S-72), so parts of the Hawking-theory chain rest on abstracts.
Shipped defects, stated not fixed: HC-10’s prior prose narrates ≈[0.56, 0.44] while the runner computes [0.6944, 0.3056] — the number stands, the narrative misleads. Nine observations (O-8, O-9, O-17, O-21, O-24, O-25, O-29, O-32, O-38) and five arguments ended as orphans, notably the anthropic-shadow trio (A-19/A-20/A-21): the shadow enters only as per-edge discounts (E-12 - O-40 × HC-10 — no vacuum decay in our past light cone at t = 0.3; E-43 - O-35 × HC-4 — Earth and Sun themselves have survived deliberately weakened) and again as argument-failure mass in HC-14. My weighing: partial overlap, not a full double-count — the edges price survivorship bias in specific evidence, HC-14 prices broader argument error; part 1’s residual assumes roughly half-overlap. The depends_on chains (HC-2←HC-1; HC-3←HC-1,2; HC-4←HC-3,5; HC-8←HC-7; HC-11←HC-10; HC-12←HC-13) were never mechanically collapsed; part 2’s prose composition substitutes.
What the debate performed rather than settled: the public case (“black holes evaporate”; “nature already ran 10^31 LHC experiments”) is not the load-bearing case (dense-star survival); the soundbite’s relativistic-escape loophole is exactly what Giddings–Mangano repaired.
External consensus (the report’s own labelled reading; enters no number). Particle physics and the official reviews treat the question as closed, quoting conditional bounds as if unconditional; risk methodologists (S-44 - Ord, Hillerbrand and Sandberg, Probing the Improbable) hold such numbers are floored by argument-error rates near 1e-3. This analysis lands with the physicists on the verdict and with the methodologists on where the residual lives. What it adds to both: the closure is empirically single-sourced, and three concrete parameter corners remain conditional rather than closed.