---
slug: "Parsimony"
name: "Parsimony"
type: "Reasoning"
layer: "Mind"
ref: "Parsimony#4df8"
sema_id: "sema:Parsimony#mh:SHA-256:4df866b08c5797a42a104097a24ea332aa3f4dfeccd73e38f27564cdb7cc6c9e"
tags: ["Mind","Reasoning"]
updated: 2026-11-11
mindscape: "bootstrap"
index_url: https://mindscape.pages.dev/bootstrap/index.json
url: https://mindscape.pages.dev/bootstrap/Parsimony/
related: ["Judge","Topology","Aesthetics","BreadthGovernor","DecompositionGate","FailurePreservingReduction","PURE","PURECheck","PUREOptimization"]
---

# Parsimony

Complexity justification via Occams Razor

Layer: Mind · Category: Reasoning

## Mechanism

A [Judge](https://mindscape.pages.dev/bootstrap/Judge.md) of structural necessity (Occam's Razor): does the minimum-complexity form of the artifact still perform its function? Applies wherever a definition, model, design, or decomposition needs to be tested for excess parts. The essential move is ablation — remove a component and see if the whole collapses — which works on theories, codebases, system designs, and cognitive schemas alike. Specific rating semantics (binary pass/fail, traffic-light ranges, ordinal ablation scores) belong on descendants or on the composing protocol; Parsimony itself names only the question and the ablation discipline. The signature Judge([Topology](https://mindscape.pages.dev/bootstrap/Topology.md)) reflects that the question operates over structural shape rather than quantitative score; an ablation is itself a topology operation, removing nodes and seeing whether the remaining shape still performs.

## Invariants

- A component is necessary when removing it stops the whole performing its function.

## Failure modes

- Joint necessity missed: a set individually redundant and jointly required passes component-wise ablation.
- Ablation without a stated function: the test reports on whatever the observer exercised.

## Signature

- `Judge(Topology)`

## Builds on

- [Judge](https://mindscape.pages.dev/bootstrap/Judge.md) (Infrastructure; References)
- [Topology](https://mindscape.pages.dev/bootstrap/Topology.md) (Infrastructure; References)

## Used by

- [Aesthetics](https://mindscape.pages.dev/bootstrap/Aesthetics.md) (Infrastructure; References)
- [BreadthGovernor](https://mindscape.pages.dev/bootstrap/BreadthGovernor.md) (Mind; References)
- [DecompositionGate](https://mindscape.pages.dev/bootstrap/DecompositionGate.md) (Mind; References)
- [FailurePreservingReduction](https://mindscape.pages.dev/bootstrap/FailurePreservingReduction.md) (Infrastructure; References)
- [PURE](https://mindscape.pages.dev/bootstrap/PURE.md) (Mind; Composes with)
- [PURECheck](https://mindscape.pages.dev/bootstrap/PURECheck.md) (Mind; Composes with)
- [PUREOptimization](https://mindscape.pages.dev/bootstrap/PUREOptimization.md) (Mind; References)

## Identity

- Sema ID: `sema:Parsimony#mh:SHA-256:4df866b08c5797a42a104097a24ea332aa3f4dfeccd73e38f27564cdb7cc6c9e`
- Ref: `Parsimony#4df8`
- Supersedes:
  - `sema:Parsimony#mh:SHA-256:1dd3e7108871db29b025e6266ad9f1ad39ba1d005a2d25a010be18e57f0f879c`
  - `sema:Parsimony#mh:SHA-256:bbc62c0fd9b1d71a06a781b4e40cf2988b6e2b61a113bf62d7ebd3ad0f149351`
  - `sema:Parsimony#mh:SHA-256:6f4d4c0144ddc4f86a73c0acaaa293e26a5e60f57ec5a292bb7b6735eaf4c8f3`

## Links

- [Pattern page](https://mindscape.pages.dev/bootstrap/Parsimony/)
- [View in the interactive graph](https://mindscape.pages.dev/bootstrap/#Parsimony)
- [JSON](https://mindscape.pages.dev/bootstrap/Parsimony.json)
- [Index of all patterns](https://mindscape.pages.dev/bootstrap/index.json)