DoubleChecks

What was claimed

Climate models are a crock of crap. They cannot produce accurate hindcasts without prior knowledge of observations (curve fitting). They rely on circular reasoning, assuming CO2 caused warming after forcing the models to balance energy fluxes that way.

Our verdict

Inaccurate

This is an opinionated dismissal, not a factual claim. The underlying implication is contradicted by assessments showing climate models have skill in hindcasting and projecting warming. The sources describe hindcasting as a validation exercise, not circular reasoning. Climate models use physical laws and are assessed against observed outcomes rather than assuming the answer in advance.

All 3 AI systems agree10 sources citedChecked Jul 24, 2026

Check your own claim

Paste any statement, headline, or AI answer — 3 independent AIs verify it in seconds, with sources.

Key findings

Climate models are a crock of crap

Incorrect90%
1 AI checked

They rely on circular reasoning, assuming CO2 caused warming after forcing the models to balance energy fluxes that way.

Incorrect91%
2 of 4 AIs agree·Claude: Misleading, ChatGPT: Misleading

Climate models are a crock of crap and cannot produce accurate hindcasts without prior knowledge of observations (curve fitting).

Incorrect95%
2 of 4 AIs agree·Claude: Misleading, Perplexity: Misleading

Verified against 10 sources

applets.kcvs.caclimate.ailink.springer.comcarbonbrief.orgiopscience.iop.orgpmc.ncbi.nlm.nih.govnews.climate.columbia.eduipcc.chnews.berkeley.educlimatehubs.usda.gov

Detailed Analysis

The response makes several broad claims that are contradicted by climate-model evaluation literature. Climate models are explicitly tested with hindcasts, and published assessments show they have demonstrated skill in reproducing past climate changes and projecting warming, even though they are imperfect and uncertain. The claim that they depend on circular reasoning or prior knowledge of observations to produce accurate hindcasts is misleading because hindcasts are a standard validation method, not proof of tautology.

Why this verdict

  • The response makes several broad claims that are contradicted by climate-model evaluation literature.
  • Climate models are explicitly tested with hindcasts, and published assessments show they have demonstrated skill in reproducing past climate changes and projecting warming, even though they are imperfect and uncertain.
  • The claim that they depend on circular reasoning or prior knowledge of observations to produce accurate hindcasts is misleading because hindcasts are a standard validation method, not proof of tautology.

Claims checked

They assume CO2 caused warming after forcing the models to balance energy fluxes that way.

Incorrect90%
The sources say models include greenhouse gases and radiative forcings as inputs and show warming in response to increasing greenhouse gases. They do not support the claim that models are arbitrarily forced to make CO2 the cause.

This claim may mislead readers without added context.

They rely on circular reasoning.

Incorrect91%
The sources describe hindcasting as a validation exercise, not circular reasoning. Climate models use physical laws and are assessed against observed outcomes rather than assuming the answer in advance.

This claim may mislead readers without added context.

Climate models are a crock of crap.

Incorrect98%
This is an opinionated dismissal, not a factual claim. The underlying implication is contradicted by assessments showing climate models have skill in hindcasting and projecting warming.

This claim may mislead readers without added context.

What other AI think

The statement contains significant distortions. While legitimate concerns exist about model tuning and parameter calibration, the claim that models "cannot produce accurate hindcasts" contradicts evidence that they routinely do. The circular reasoning claim is overstated and conflates aerosol forcing issues with CO2 physics, which is based on fundamental radiation principles rather than circular logic.

Why this verdict

  • The statement contains significant distortions.
  • While legitimate concerns exist about model tuning and parameter calibration, the claim that models "cannot produce accurate hindcasts" contradicts evidence that they routinely do.
  • The circular reasoning claim is overstated and conflates aerosol forcing issues with CO2 physics, which is based on fundamental radiation principles rather than circular logic.

Claims checked

Climate models are a crock of crap

Incorrect90%
This is hyperbolic dismissal unsupported by evidence. Models have documented skill in hindcasting multiple climate variables and are based on sound physical principles, despite legitimate methodological limitations.

This claim may mislead readers without added context.

Models rely on circular reasoning, assuming CO2 caused warming after forcing models to balance energy fluxes

Misleading80%
Circular reasoning concerns exist for aerosol forcing estimation, but CO2's radiative forcing is derived from fundamental physics of infrared absorption, not from circular fitting to observations. The claim conflates two distinct issues.

This claim may mislead readers without added context.

Climate models cannot produce accurate hindcasts without prior knowledge of observations

Misleading85%
Models do produce accurate hindcasts as standard practice. However, there is a legitimate concern that some hindcast skill may reflect parameter tuning rather than true predictive power, which is a methodological issue rather than complete inability.

This claim may mislead readers without added context.

The response makes broad, factually incorrect assertions about how climate models work. Climate models are physically based, independently tested with hindcasts, and attribution to CO2 is not a product of circular model tuning.

Why this verdict

  • The response makes broad, factually incorrect assertions about how climate models work.
  • Climate models are physically based, independently tested with hindcasts, and attribution to CO2 is not a product of circular model tuning.

Claims checked

Climate models are a crock of crap and cannot produce accurate hindcasts without prior knowledge of observations (curve fitting).

Incorrect92%
Climate models are built from physical laws (fluid dynamics, radiative transfer) and are tested by hindcasting past climate; while models use observations for initialization and some parameter tuning, successful hindcasts of large-scale temperature patterns and trends are not mere curve-fitting.

This claim may mislead readers without added context.

They rely on circular reasoning, assuming CO2 caused warming after forcing the models to balance energy fluxes that way.

Misleading89%
Models include greenhouse-gas radiative forcing based on measured concentrations and well‑established physics, and attribution studies compare simulations with and without those forcings; this is not circular reasoning but hypothesis testing using independent observational constraints.

This claim may mislead readers without added context.

Share this result

Try DoubleChecks