Recognises an incomplete extensional definition
A definition that lists the members of the concept leaves some out, or ends with "etc.", "e.g." or "such as". Partial lists belong in a note or a value set.
Can AI do this?
AI does this well Most of the tested AI models master this. 3 of 4 models in the current benchmark master it.
| Model | Tier | Probability of mastery | Status |
|---|---|---|---|
| gemini-4-argon | Flagship | 97% | Mastered |
| gemini-3.1-pro-preview* | Flagship | 100% | Mastered |
| gpt-6-astra* | Flagship | 100% | Mastered |
| claude-fable-5-1* | Flagship | 100% | Mastered |
| gemini-3.8-flash* | Mid tier | 100% | Mastered |
| gpt-6.1-sol* | Mid tier | 100% | Mastered |
| claude-sonnet-5-5* | Mid tier | 100% | Mastered |
| gemini-3.5-flash-lite | Low cost | 93% | Mastered |
| gpt-6-luna | Low cost | 97% | Mastered |
| claude-haiku-5-5 | Low cost | 31% | Not shown |
* From the earlier benchmark of 2026-10: 10 data-modelling test tasks, 3 runs per task, graded by claude-opus-5-5. These models have not taken the current 123 tasks yet; the two methods differ, so compare their figures with care. They are left out of the “most models” counts and the best-model picks.
Mastered means a probability of at least 90% that the model has this knobit, estimated from its graded answers. “Not shown” means the answers do not settle it either way. How the models are tested.
What it looks like in practice
Expected result: The open list and the intensional definition or value set replacing it
How it is assessed: Flags the deficient case and passes the acceptable one. Deficient: party: person, company, etc. Acceptable: party: natural person or legal person
Also known as: Incomplete extensional definition (business term)
Related knobits
Builds on
Usually followed by
All 18 knobits of Define business terms in the glossary.
Source: Review checklist 03-business-glossary (metadata-management), row 8; formerly data-modelling K-208