Examples
Examples
Try the starting example
- Records: unique record ID, entity ID, split label, YYYY-MM-DD date
- R1,E1,train,2026-10-01 R2,E1,test,2026-10-20 R3,E2,train,2026-10-15 R4,E3,test,2026-10-05
- Supplied chronological cutoff date
- 2026-10-10
- Entities present in more than one supplied split
- E1
- Record counts by split
- train: 2; test: 2
- Train records dated strictly after cutoff
- R3
- Other-split records dated on or before cutoff
- R4
- Unique entities
- 3
Try another scenario
- Records: unique record ID, entity ID, split label, YYYY-MM-DD date
- R1,E1,train,2026-10-01 R2,E1,test,2026-10-20 R3,E2,train,2026-10-15 R4,E3,test,2026-10-05
- Supplied chronological cutoff date
- 2026-10-16
- Entities present in more than one supplied split
- E1
- Record counts by split
- train: 2; test: 2
- Train records dated strictly after cutoff
- None
- Other-split records dated on or before cutoff
- R4
- Unique entities
- 3
Calculation method
Calculation method
Entities present in more than one supplied split
Exact entity-ID equality across distinct split labels.
Record counts by split
Count supplied records for each literal split label.
Train records dated strictly after cutoff
The literal train split is expected on or before cutoff.
Other-split records dated on or before cutoff
All split labels other than train are compared to strictly-after cutoff.
Unique entities
Distinct literal entity IDs.
Symbols and units
- a
- Records: unique record ID, entity ID, split label, YYYY-MM-DD date
- b
- Supplied chronological cutoff date
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- A supplied identity/date audit, not proof of statistical leakage. Exact identifiers only; train is a literal label, all other splits are treated as holdouts, and dates have no time-of-day. No source data is changed.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
OpenStax: arithmetic and geometry ↗
Background reading; this does not imply endorsement or independent review of SumFizz.