Round 1
One saved weekly assessment of Pure water has a metastable liquid–liquid critical point between 150 and 250 K., kept as it was published. It is an estimate from three models reading the evidence, not proof the hypothesis holds, and it did not set any price.
- Published
- Oct 19, 2026 07:08 PM EDT
- Estimate
- 61%
- Range the models covered
- 42–78%
- Confident binary
- No unanimous verdict this round.
- Methodology
- panel-v9
- Round hash
a31d0970946d310eaf6984d22d4356f47f37916aa83bb08d0f9b0cc5a337bd8e
The hash commits to this round's recorded bytes. It does not prove the wording is sound or that the science is right.
openai/gpt-6.1-sol
You et al.’s ultrafast scattering and heat-capacity signatures support a critical region, while molecular simulations independently support plausibility within the specified domain. However, the retrieved primary records do not establish independently reproduced coexistence of equilibrated bulk liquids, calibrated pressure and critical scaling with systematic uncertainties sufficient for YES; neither provides the domain-wide exclusion required for NO.
What would change this view: Independent experiments resolving equilibrated liquid coexistence and endpoint scaling with calibrated pressure would raise support; validated domain-wide thermodynamic exclusion would sharply lower it.
anthropic/claude-sonnet-5.5
You et al. (Science, March 2026) report ultrafast-heating x-ray evidence of a liquid-liquid critical point near 210±8 K. It is a single peer-reviewed experiment, and the criterion requires an independent reproduction. It also starts from amorphous ices, and the pressure domain and a terminating coexistence line are not clearly established. Nothing excludes the line either, so the evidence supports neither YES nor NO.
What would change this view: An independent group reproducing the critical scaling and coexistence line on independently prepared samples would move this toward YES. A validated thermodynamic reconstruction excluding the line across the whole domain would move it…
x-ai/grok-4.7
You et al. (Science 2026) report critical-like fluctuations and a heat-capacity rise at 210±8 K before ice forms, and accurate simulations place an LLCP near 198 K and ~127 MPa. That supports the claim but does not establish it: there is no independent experimental reproduction, bulk ergodic equilibration is unproven, and no reconstruction excludes the line across the full domain.
What would change this view: An independent bulk-liquid experiment mapping coexistence and critical scaling in-window, or a reconstruction excluding it throughout, would move the call.
Round 1: score 0.61
OpenAI estimated 0.78. You et al.’s ultrafast scattering and heat-capacity signatures support a critical region, while molecular simulations independently support plausibility within the specified domain. However, the retrieved primary… Anthropic estimated 0.42. You et al. (Science, March 2026) report ultrafast-heating x-ray evidence of a liquid-liquid critical point near 210±8 K. It is a single peer-reviewed experiment, and the criterion requires an independent reproduction.… xAI estimated 0.63. You et al. (Science 2026) report critical-like fluctuations and a heat-capacity rise at 210±8 K before ice forms, and accurate simulations place an LLCP near 198 K and ~127 MPa. That supports the claim but does not… The panel disagreed by 0.36, so read this average as soft. The three models did not return a unanimous confident binary, so the market is not decided.
No audit bundle is recorded for this round. A bundle from another round is not substituted for it.