What can change an assessment?
A factual correction fixes something that was wrong when published: a date, quotation, attribution or other checkable claim. A substantive correction will state what was wrong, what replaces it and how the change affects the judgements.
An update responds to information that became available after the evidence cutoff. A changed judgement is not necessarily a correction of an earlier error. The update will explain the new evidence and its effect.
An analytical challenge disputes an interpretation, assumption or step in the reasoning. It can be sound without proving a factual error. We assess the argument and record a substantive revision if it changes the assessment. Disagreement alone is not grounds for rewriting a conclusion.
How revisions will be recorded
Assessments will show their publication date, evidence cutoff, latest substantive revision and version. Each substantive change will identify the affected judgement, the reason for the change, and the previous and revised likelihood or confidence where applicable. Material withdrawn claims will be visibly marked, not quietly erased.
Minor spelling and layout fixes do not need separate notices unless they change meaning. Earlier released versions should be retained after a privacy review; retaining a private record does not by itself provide a public version archive.
Making a useful challenge
Identify the assessment and version, quote or identify the specific claim, link to an inspectable source or set out a competing explanation, and explain what difference it makes. Distinguish a disputed fact from a disputed interpretation. Please avoid sending sensitive personal information or material you are not entitled to share.
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Current record
No assessments have been published. There are no published corrections or revisions to list.