nut
Enable an AI agent to recognise a nut as a biological fruit, assess its maturity and integrity, and determine whether handling, storage, propagation or food use is supported by evidence.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex + Grok
Purpose and description
Enable an AI agent to recognise a nut as a biological fruit, assess its maturity and integrity, and determine whether handling, storage, propagation or food use is supported by evidence.
A nut is a dry indehiscent fruit whose pericarp lignifies into a hard shell around, usually, a single seed; in agriculture, food trade and allergy law the same name is extended to morphologically different edible oily kernels that are botanically drupe seeds, legume seeds or gymnosperm seeds.
It can be Inspect the fruit and associated coverings to refine identification.; Measure shell geometry, mass, moisture and seed filling using suitable methods.; Open or section the nut when internal inspection justifies destructive examination.; Choose and monitor storage or drying conditions using identity-specific evidence.; Assess suitability for a germination attempt and record the outcome.; Route the nut for food-use assessment, further testing or rejection according to documented evidence..
Distinguishing features
Establish whether the object is a whole fruit, an extracted seed or a fragment; a loose edible kernel does not establish the original fruit type.
Determine which tissue forms the hard enclosure: fruit wall or seed coat.
Check whether an intact mature fruit naturally remains closed; distinguish natural opening from breakage, animal damage and processing.
Record whether a fleshy fruit layer surrounds or formerly surrounded a hard inner enclosure, supporting comparison with a drupe.
Compare verified parent-plant identity and fruit anatomy with botanical usage; record a culinary 'nut' label separately.
Scope
+ Identification of the nut and its relationship to its parent plant
+ Distinction between fruit wall, seed coat and enclosed seed
+ Maturity, filling, attachment and germination state
+ Shell and kernel integrity, moisture and observed deterioration
+ Evidence supporting storage, opening, propagation or food use
- The parent plant's overall physiology, cultivation and health
- Metal threaded nuts and their fastening functions
- Recipes and manufactured foods containing nuts
- Human allergy diagnosis and individual dietary suitability
- Commercial lot certification, packaging systems and supply-chain management
Characteristics
- Identity and evidence
- Candidate plant taxon, confidence and identification basis Identity determines how anatomy, maturity and potential uses should be interpreted.
- Meaning of nut
- Botanical fruit / culinary designation / unresolved Prevents a shared food name from silently determining biological classification.
- Parent plant
- Observed parent individual or attributed taxon; unknown permitted Links the specimen to evidence needed for identification and developmental interpretation.
- Retained anatomical parts
- Fruit wall, seed coat, seed, associated covering; present / absent / uncertain Defines the object being assessed and distinguishes intact fruit from processed material.
- Dimensions and mass
- Length, width and shell thickness in mm; mass in g; anatomical basis recorded Supports identification, comparison and selection of handling or opening methods.
- Developmental state
- Immature / mature / germinating / unresolved, with assessment evidence Determines which storage, harvest or propagation actions warrant consideration.
- Seed filling
- Empty / partly filled / filled / unexamined, with inspection method External shell appearance alone does not establish usable internal material.
- Moisture content
- Percent by mass, specifying wet or dry basis, sampled tissue and method Supports interpretation of drying, storage and propagation suitability.
- Shell and internal condition
- Intactness, cracks, holes, discoloration, visible growth and abnormal odour; inspected parts recorded Identifies damage and deterioration while preserving limits of inspection.
- Prior treatment
- Raw / dried / heated / chemically treated / other / unknown, with available details Treatment can change the evidence needed for food use and propagation.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.nut-artifact
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 9 layers · 16 findings · 29 questions.
Nut identity and boundary Establish what biological object is present and why it is being called a nut.
The term can conceal differences between whole fruits, seeds and culinary groupings that change subsequent decisions.
Botanical and named identity
Separate supported plant identity from the name attached to the specimen.
Identity basis
Record the proposed identity, supporting observations and unresolved alternatives.
- Which plant taxon is supported by the specimen or its parent plant, and with what confidence? definition
- Does the label 'nut' come from anatomical identification, a supplier label or culinary usage? provenance
Fruit and seed boundaries
Identify the hard enclosure, enclosed seed and any retained associated covering.
Anatomical membership
Record which parts belong to the fruit and which parts are missing, detached or uncertain.
- Is the observed hard enclosure fruit wall, seed coat or an unresolved structure? boundary
- Is this an intact fruit, a fruit with associated covering, an extracted seed or a fragment? boundary
- What evidence distinguishes natural mature opening from cracking or deliberate shell removal? definition
Nut development and seed potential Assess fruit maturity, internal development and the evidence for propagation.
A formed shell, a filled seed and a seed capable of germination are separate assessments.
Fruit maturity and filling
Evaluate developmental stage and the presence of developed internal material.
Maturity and fill evidence
Record maturity indicators and seed filling without treating external appearance as sufficient evidence.
- Which maturity indicators are supported for the identified plant, and which are present? measurement
- Is the enclosure empty, partly filled or filled, and how was that assessed? measurement
Viability and germination
Separate observed germination, tested viability and untested propagation potential.
Propagation evidence
Record evidence and history relevant to whether the enclosed seed can be used for propagation.
- Has viability been tested or germination observed, using which method and on what date? measurement
- What drying, heating, storage or other treatment has this nut undergone? provenance
- What identity-specific evidence is needed before selecting a germination treatment? action
Shell and kernel condition Describe protective enclosure integrity and the condition of accessible internal material.
The shell can hide an empty, damaged or deteriorated interior, so inspection coverage must accompany condition judgments.
Shell integrity
Assess enclosure geometry, breaches and evidence of their origin.
Shell breaches and geometry
Record dimensions and damage that affect protection, inspection and controlled opening.
- What are the nut's dimensions and, where measurable, shell thickness? measurement
- Which cracks, punctures or holes are present, and what evidence supports their attributed cause? measurement
Internal condition
Assess the seed and inner surfaces while stating what remains unexamined.
Kernel condition and inspection limits
Record moisture and deterioration observations separately from conclusions requiring additional testing.
- What moisture result is available, for which tissue, measurement basis and method? measurement
- What internal damage, visible growth, discoloration or abnormal odour was observed? measurement
- Which internal regions or potential defects remain beyond the inspection performed? boundary
Nut use and intervention Connect identity, condition and treatment history to a justified next action.
Opening, drying, eating and sowing impose different requirements on the same nut.
Storage and opening
Choose preservation and access methods suited to the intended use.
Handling plan
Record the intended outcome and evidence supporting storage, drying or shell opening.
- Is the priority preserving a viable seed, retaining food quality or examining anatomy? action
- Which storage or drying conditions are supported for this identity, maturity and intended use? action
- Can the required inspection be completed without opening the shell, and what would opening sacrifice? action
Food-use evidence
Determine whether identity, preparation and condition evidence support considering the nut for food use.
Food-use disposition
Keep a common edible name separate from evidence that this specimen is suitable for its proposed use.
- What reliable evidence establishes food use and any required preparation for the identified plant part? provenance
- Do this specimen's condition and treatment history support the proposed use, require further testing or justify rejection? action
- Which decisions require a neighbouring food-safety or person-specific dietary model? boundary
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- True botanical nuts (hazelnut, chestnut, acorn, beechnut)
- Walnut-family kernels (walnut, pecan, hickory)
- Almond-type Prunus kernels
- Anacardiaceae kernels (cashew, pistachio)
- Peanuts / groundnuts (Arachis hypogaea)
- Pine nuts (Pinus seeds)
- Tropical hard-shelled nuts (Brazil nut, macadamia)
- Coconut, when a food system treats it as a nut rather than as a separate oil-fruit
- Which of these kinds and varieties hold for the sense of nut this model covers, and on what evidence? provenance
Identifiers and schemes
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Wikidata - Q11009 - Item for nut as a type of fruit; species sold as nuts have their own items.
- Harmonized System (WCO) - 0801 (coconuts, Brazil nuts, cashew nuts); 0802 (other nuts, fresh or dried, shelled or not) - Peanuts are classified as oilseeds under heading 1202, not as nuts.
- EU allergen labelling (Reg. 1169/2011 Annex II) - almonds, hazelnuts, walnuts, cashews, pecan nuts, Brazil nuts, pistachio nuts, macadamia/Queensland nuts; peanut listed separately - Chestnut, pine nut, coconut and acorn are outside this closed list.
- FDA major food allergen (FALCPA) - peanut; tree nuts (named by common name, e.g. almond, walnut) - Coconut is generally not treated as a tree nut for U.S. allergen labelling.
- Which of these identifiers and schemes hold for the sense of nut this model covers, and on what evidence? provenance
Standards and regulation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- CXS 193-1995 maximum levels for aflatoxins in peanuts and tree nuts - FAO/WHO Codex Alimentarius Commission
- CXS 200-1995 Standard for Peanuts - FAO/WHO Codex Alimentarius Commission
- UNECE DDP standards for marketing and commercial quality of specified nuts (in-shell and kernels) - United Nations Economic Commission for Europe
- Regulation (EU) No 1169/2011 Annex II, tree nuts and peanuts as allergenic ingredients - European Union
- Commission Regulation (EU) 2023/915 on contaminants in food (aflatoxins in nuts; successor to 1881/2006) - European Commission
- Food Allergen Labeling and Consumer Protection Act of 2004 and implementing FDA rules - United States
- USDA Agricultural Marketing Service United States Standards for Grades of almonds, walnuts, pecans, filberts/hazelnuts and other tree nuts - USDA
- Which of these standards and regulation hold for the sense of nut this model covers, and on what evidence? provenance
Real-world use
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Eaten as snack nuts, in confectionery and bakery, and as nut butters and milks
- Pressed for edible oils (peanut, walnut, hazelnut, coconut, almond)
- Used as a protein-and-fat ingredient in processed foods and, as meal or cake, in animal feed
- Acorns and other mast crop as wildlife forage and, in Iberian montanera systems, as pig feed for cured ham
- Chestnut and acorn flours as traditional staple or famine foods in parts of the Mediterranean, East Asia and Indigenous North America
- Handled in food plants as a controlled allergen, with segregated lines and mandatory labelling
- Which of these real-world use hold for the sense of nut this model covers, and on what evidence? provenance
Typical measurements
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Kernel oil content (oily culinary nuts) - 45-75 - % of kernel mass
- Kernel oil content (chestnut) - 2-5 - % of kernel mass
- Kernel moisture for safe dry storage - 3-8 - % of kernel mass
- Single-kernel mass - 0.02 (pine nut) to about 5-8 (Brazil nut, macadamia) - g
- Kernel protein - 10-26 - % of kernel mass
- Aflatoxin B1 maximum in ready-to-eat nuts (EU order of magnitude) - 2-8 - µg/kg
- Which of these typical measurements hold for the sense of nut this model covers, and on what evidence? provenance
Failure modes and hazards
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Aflatoxin and other mycotoxins from Aspergillus on peanuts, pistachios, Brazil nuts and other nuts stored warm and damp
- IgE-mediated peanut and tree-nut allergy, including anaphylaxis
- Oxidative rancidity of unsaturated kernel oils
- Survival of Salmonella and other pathogens on low-moisture kernels
- Stored-product insects (navel orangeworm, Indian meal moth and others) and subsequent quality rejection
- Cyanogenic glycosides in bitter almond and some apricot kernels
- Selenium toxicity from heavy Brazil-nut consumption (the seed hyperaccumulates Se)
- Choking on whole nuts, especially in young children; shell fragments as physical contaminants in processed food
- Which of these failure modes and hazards hold for the sense of nut this model covers, and on what evidence? provenance
Regional variation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- English "nut" in shops is usually oily tree-nut kernels plus peanut; chestnut, coconut and pine nut are often sold in other aisles
- "Groundnut" is the ordinary name for peanut in much of Africa, South Asia and older British usage
- U.S. Pacific Northwest still uses "filbert" alongside "hazelnut"
- French noix, Spanish nuez and Italian noce default to walnut; the broader class is fruits à coque / frutos secos / frutta secca
- Coconut is a nut in some culinary traditions, a fruit or oilseed in trade statistics, and usually not a tree-nut allergen in U.S. FDA practice
- Acorn foods remain ordinary in parts of Korea (dotori-muk) and in some Indigenous Californian practice, but are forage or historical food elsewhere
- Peanut is the default "nut" in many West African diets; cashew and coconut dominate several Indian Ocean and South Asian trades
- Which of these regional variation hold for the sense of nut this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Hardware nut (fastener) - A manufactured internally threaded piece; the living nut is a fruit or seed and has no thread.
- Drupe (stone fruit) - A drupe is fleshy at maturity with a stony endocarp; a botanical nut is dry, and the hard wall is pericarp. Almond, walnut and pecan kernels are seeds of drupes, not true nuts.
- Legume / pulse - Peanut is a subterranean legume fruit; it remains a pulse botanically even when sold as a nut. True nuts do not form from a dehiscent Fabaceae pod.
- Stone or pit of a fleshy drupe (peach, cherry, plum) - That stone is lignified endocarp around an inedible or rarely eaten seed; a culinary nut is the marketed edible kernel, sometimes the homologous Prunus seed (almond).
- Water chestnut - Eleocharis dulcis is a corm and Trapa is an aquatic fruit; neither is a tree nut on allergen or HS nut headings.
- Areca (betel) nut - Seed of Areca catechu used as a stimulant; not a culinary tree nut on EU/US food-allergen lists and not an HS 0801/0802 dessert nut.
- Oilseed (sunflower, sesame, rapeseed) - Small seeds grown primarily for crushing; nuts are larger kernels eaten whole or as pieces, even when oil content is similar.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of nut this model covers, and on what evidence? provenance
Sources
- Nut (fruit) - Wikipedia, Wikimedia Foundation - Botanical versus culinary scope of "nut", and the main taxa sold as nuts.
- The Kew Plant Glossary: an Illustrated Dictionary of Plant Terms (2nd ed.), Henk Beentje - Kew Publishing, Royal Botanic Gardens, Kew - Morphological definition of a nut as a dry indehiscent fruit with a hard pericarp.
- Regulation (EU) No 1169/2011 on the provision of food information to consumers, Annex II - European Union - The eight tree nuts plus peanut that European labelling law treats as allergens.
- Food Allergen Labeling and Consumer Protection Act of 2004 (FALCPA) and FDA major-food-allergen guidance - U.S. Congress / U.S. Food and Drug Administration - Peanut and tree nuts as major U.S. food allergens, and the common U.S. practice of keeping coconut off the tree-nut allergen list.
- General Standard for Contaminants and Toxins in Food and Feed (CXS 193-1995) - FAO/WHO Codex Alimentarius Commission - International maximum levels for aflatoxins in peanuts and tree nuts.
- UNECE DDP commercial quality standards for dry and dried produce (walnuts, almonds, hazelnuts, pistachios, pecans, pine nuts and related products) - United Nations Economic Commission for Europe - How nuts are graded and traded as in-shell fruit versus shelled kernels.
What the second pass must settle
- Does vr.tr.nut-q190977 designate botanical nuts, culinary nuts or both, and which authoritative registry evidence settles that boundary?
- Which existing Vercy fruit, seed or food models already own parts of this scope and should be linked instead of duplicated?
- Which anatomical tests and exceptions are necessary to distinguish the intended nut class from drupes, capsules and hard-coated seeds?
- Which maturity, moisture, storage and germination criteria can be shared across the intended class, and which require taxon-specific extensions?
- What evidence is sufficient for food-use decisions, and where must laboratory testing or specialist assessment replace specimen-level observation?