CHECKED IN SOURCE DATADataset consistency
All 111 IDs are unique, each fragment belongs to one of 19 available IMO-related families, every declared first-error index is within the corresponding list of proof steps, and no fragment has an empty title or malformed step list.
NOT INDEPENDENTLY CHECKEDGold label correctness
Passing these structural checks does not certify that an argument labelled CLEAN is correct, or that the indicated flaw is truly the earliest unsupported inference. That requires independent mathematicians.
OPEN TO MATHEMATICAL CRITIQUEPublic practice casebook
The 111-case review export contains theorem context, official source link and numbered proof steps, but omits our original proof titles and author labels to reduce accidental hints during review.
RESEARCH INTAKE CLOSEDHuman data
No verified consented human-subject results are reported. The public practice library cannot be reused as a sealed evaluation benchmark because the reference labels are already exposed in the main site.