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Climate Claim Checker

Dev claim · claim-2662 · #30 of 154

“"...there is the contention by Wolfgang Knorr of the Department of Earth Sciences at the University of Bristol in England that carbon dioxide levels in the atmosphere are about where they were 160 years ago." (as quoted by Ken Ward Jr.)”

Claim tags (sorted stems; highlighted when a passage shares them)

  • ago
  • atmospher
  • bristol
  • carbon
  • content
  • depart
  • dioxid
  • earth
  • england
  • jr
  • ken
  • knorr
  • level
  • quot
  • scienc
  • univers
  • ward
  • wolfgang
  • year

Annotators’ label

Refutes Run this claim live

The model’s verdict

The Transformer retrained from the notebook (the 2024 weights were never saved), shown three ways. The first is how the notebook evaluated it.

Notebook protocol

Dev claims predicted in batches of 16, in file order, from the 2024 retrieved evidence, as the notebook does.

Supports✗ differs from the label
Supports
60.9%
Refutes
28.1%
Not enough info
1.9%
Disputed
9.0%

One claim at a time

The same model run on a single claim, which is how the Try-it page runs it.

Supports✗ differs from the label
Supports
54.0%
Refutes
32.2%
Not enough info
8.9%
Disputed
5.0%

With gold evidence

Fed the human-annotated evidence instead of retrieved passages. This is the 'val accuracy' the training loop reports.

Not enough info✗ differs from the label
Supports
3.9%
Refutes
0.7%
Not enough info
93.2%
Disputed
2.2%

Retrieved vs gold evidence

Gold passages were picked by the dataset’s annotators. Retrieved passages are what the TF-IDF rule returned from all 1.19M passages. Switch between the submitted 2024 output and the re-runs.

2024 submission

The passages the team actually retrieved and submitted in 2024 (their saved output file). The file records only passage ids, so scores are recomputed with the submission rule.

Path
not recorded
Found
0 of 4 gold
P
0.00
R
0.00
F
0.00
  1. #1evidence-203620

    The Department of Earth Sciences at Cambridge is the University of Cambridge 's Earth Sciences department.

    • scienc (shared with the claim)
    • depart (shared with the claim)
    • earth (shared with the claim)
    • univ
    • cambridg
    cos
    0.707
    overlap
    0.600
    score
    1.307
    shared
    3

Gold evidence (4)

  1. evidence-450316

    The concentration of carbon dioxide in the atmosphere today is much lower than it was when plants emerged onto land during the Ordovician and Silurian periods.

    • onto
    • atmosph
    • today
    • lower
    • concentr
    • dioxid (shared with the claim)
    • ordovician
    • emerg
    • carbon (shared with the claim)
  2. evidence-657496

    For example, diverse geochemical and paleontological proxies indicate that at the maximum of global warmth the atmospheric carbon dioxide values were at 700–900 ppm while other proxies such as pedogenic (soil building) carbonate and marine boron isotopes indicate large changes of carbon dioxide of over 2,000 ppm over periods of time of less than 1 million years.

    • isotop
    • warmth
    • proxi
    • dioxid (shared with the claim)
    • carbon (shared with the claim)
    • indic
    • ppm
  3. evidence-962456

    "Paleobotanical Evidence for Near Present-Day Levels of Atmospheric CO2 During Part of the Tertiary".

    • atmosph
    • level (shared with the claim)
    • محمد
    • present
    • part
    • evid
    • near
    • day
    • tertiari
  4. evidence-800880

    At a meeting of the American Geophysical Union (December 17, 2008), scientists detailed evidence in support of the controversial idea that the introduction of large-scale rice agriculture in Asia, coupled with extensive deforestation in Europe began to alter world climate by pumping significant amounts of greenhouse gases into the atmosphere over the last 1,000 years.

    • geophi
    • rice
    • pump
    • deforest
    • alter