Reusable cognitive primitives
Conservation
Some quantity stays constant no matter how a system rearranges — it can move or transform but is never created or destroyed.
Where it appears
Dependencies & synergies
Derived from the graph’s real structure — 10 concepts across 13 disciplines carry this pattern. Every figure is a count, not a score.
How many concepts carrying this pattern are seen through each discipline.
Other thinking patterns that recur on the same concepts — the more shared concepts, the more often they co-occur.
What kinds of relationships the carrying concepts form — the relational signature of the pattern.
Concepts where this pattern does the most cross-disciplinary work — each reaches disciplines beyond its own.
- Carbon cyclereachesAgricultureClimatologyEarth & Space SciencesEcologyEconomicsGeochemistryMicrobiologyPhysicsSystems Science
- Nitrogen cyclereachesChemistryEnvironmental ScienceGeographyGeologyMicrobiologySustainability Science
- Chemical reactionreachesAtmospheric ScienceChemical EngineeringEngineeringMaterials EngineeringPhysical Chemistry
- Water cyclereachesBiologyChemistryGlaciologyOceanography
- Conservation of energyreachesBiologyEngineeringEnvironmental EngineeringNutrition Science
- Biogeochemical cyclereachesHydrologyMeteorology
Carrying concepts that others in the same pattern build on (they depend on or follow from these).
- Mass — 1 other concept build on it
Examples across disciplines
Energy and momentum are conserved in every collision.
Mass is conserved: atoms are only rearranged in a reaction.
The water and carbon cycles move a fixed pool through many reservoirs.
How this pattern travels
Interpreted from where the pattern recurs in the atlas — structural transfer and coverage, not a claim it is universally the "best" model.
Recurs across 13 disciplines over 10 carrier concepts — a broadly transferable pattern.
structural · Structural recurrence in the atlas — a pattern is a reasoning lens, not a law.
3 of its 10 carrier concepts are themselves cross-disciplinary connectors.
structural · Structural recurrence in the atlas — a pattern is a reasoning lens, not a law.
Explicit "where it breaks" notes exist for 10 of 10 annotated assignments.
curated · Curated boundary annotations — absence is a representation gap, not evidence the model has no limits.
Currently dark in the atlas: no origin recorded.
atlas representation · Describes the current Thinking OS representation, not the model itself.
Coverage matrix
How these concepts distribute across domains and concept families — real counts, not a score.
The statistical fingerprint
How the 10 concepts that exercise this pattern distribute — from the graph, not a ranking.
Disciplinary fingerprint
Carrier concepts under each illuminating lens.
How settled its carriers are
Epistemic status of the concepts that exercise this pattern.
Where the model breaks
This pattern is a reasoning lens, not a law. Here is where it stops helping:
- Angular momentum: Conserved only with no external torque; friction, tides and collisions bleed it away, so an isolated-system idealisation rarely holds exactly.
- Biogeochemical cycle: Conservation tracks atoms around the loop; it does not bound the RATE or reveal bottlenecks, which is what usually matters ecologically.
- Carbon cycle: Only carbon ATOMS are conserved — their chemical form, availability and location are not; the model is atom-bookkeeping, not a balance of usefulness.
- Chemical reaction: Atoms and charge are conserved (the balance), but molecules, bonds and free energy are not — "conservation" here is only the atom count.
- Conservation of energy (mechanism): Holds for closed systems and says nothing about DIRECTION or usefulness — that is the second law; energy is conserved even as it degrades to unusable heat.
- First law of thermodynamics (mechanism): Balances energy but is blind to irreversibility: it permits processes (heat flowing cold→hot) that the second law forbids.
- Mass: Rest mass is not separately conserved in nuclear or relativistic processes — only the combined mass–energy is; treating mass alone as conserved fails there.
- Momentum (mechanism): Conserved only for a closed system with no net external force; by Noether's theorem it reflects the symmetry of space under translation.
- Nitrogen cycle: The element is conserved, but reactive vs inert nitrogen are worlds apart biologically — conservation says nothing about which form is available to life.
- Water cycle: Water molecules are conserved globally, but not locally or in usable form — a drained aquifer is a real loss even though the water still exists somewhere.
4 of 10 explained assignments cite a source; the rest are editorial interpretations. None is externally validated.
✕ Things that vanish are gone. Usually they've just moved or changed form — burned wood becomes gas, not nothing.
Journeys where it shows up
You have seen this model in one place. Where else could it apply — and where would the analogy break?
Angular momentum →Track the conserved quantity like an accountant: whatever leaves here must show up there. A missing amount means you've missed a path.
- Recurs across 13 disciplines.
- 23 concepts exercise this thinking pattern.
- 10 of them explicitly note where the model breaks down.
- It is practised in 1 learning journey.
Derived from the graph — a pattern is a reasoning lens, not a law.
Is there a quantity that can move or change form but never appear or vanish — so if it seems to go missing, you've overlooked a path?
Keep this question handy when you meet something new — it helps you notice the pattern, not just name it.