Analogy (law)¶

A legal reasoning method extending a rule or precedent to an unresolved case because legally relevant similarities outweigh material differences.

Version: v1 · 2026-09-08 · History
Domain-specific #: 3278
Origin domain: legal reasoning
Subdomain: legal reasoning

Core Idea¶

Civil-law statutory analogy and common-law analogical precedent draw authority differently, and criminal legality can prohibit analogy against an accused; surface similarity never suffices without the rule’s rationale. The decision maker identifies the source case or provision, extracts its legally relevant reason, maps that reason to the new facts, tests disanalogies and extends or withholds the rule. The abstraction is therefore identified by a declared carrier, a transformation or constraint over that carrier, and an invariant that tells an analyst whether the named structure is genuinely present.

Scope of Application¶

Analogy (law) belongs to legal reasoning and is useful where the analyst can specify the typed legal reasoning carrier, defining objects and relations, parameters, conventions, evidence, boundary cases, and comparison targets, then evaluate the jurisdiction and legal tradition, unresolved issue, authoritative source, source facts and holding or provision, ratio or purpose, mapped similarities, material differences, permission or prohibition on analogy and resulting rule and remedy are explicit. The scope is broad within that domain but bounded by the need for the jurisdiction and legal tradition, unresolved issue, authoritative source, source facts and holding or provision, ratio or purpose, mapped similarities, material differences, permission or prohibition on analogy and resulting rule and remedy are explicit.

Clarity¶

The abstraction clarifies a crowded vocabulary by making the jurisdiction and legal tradition, unresolved issue, authoritative source, source facts and holding or provision, ratio or purpose, mapped similarities, material differences, permission or prohibition on analogy and resulting rule and remedy are explicit the center of the account. A claim should name the carrier, the governing operation or relation, the applicable assumptions, and the recognition test.

Manages Complexity¶

Without the abstraction, an analyst must reason directly over many local details: the carrier roles, admissibility assumptions, competing conventions, derived invariants, boundary cases, and proof or validation obligations specific to Analogy (law). Analogy (law) compresses them into the roles in the structural signature. That compression permits comparison across instances without erasing the variables that determine validity. It also exposes which details may be varied safely and which are constitutive.

Abstract Reasoning¶

Identify the carrier. State what the elements, states, objects, or observations are: the typed legal reasoning carrier, defining objects and relations, parameters, conventions, evidence, boundary cases, and comparison targets. Reject examples whose alleged carrier belongs to a different problem. 2. Lock the constitutive rule. Express the jurisdiction and legal tradition, unresolved issue, authoritative source, source facts and holding or provision, ratio or purpose, mapped similarities, material differences, permission or prohibition on analogy and resulting rule and remedy are explicit independently of one notation or implementation.

Knowledge Transfer¶

Knowledge transfers strongly among subfields of legal reasoning because they reuse the typed legal reasoning carrier, defining objects and relations, parameters, conventions, evidence, boundary cases, and comparison targets, The decision maker identifies the source case or provision, extracts its legally relevant reason, maps that reason to the new facts, tests disanalogies and extends or withholds the rule., and type the carrier, state every parameter and convention in the definition, test that the jurisdiction and legal tradition, unresolved issue, authoritative source, source facts and holding or provision, ratio or purpose, mapped similarities, material differences, permission or prohibition on analogy and resulting rule and remedy are explicit, compare the nearest accepted identity, and report counterexamples, uncertainty, and limiting cases.

Relationships to Other Abstractions¶

Current abstraction Analogy (law) Domain-specific

Parents (1) — more general patterns this builds on

Analogy (law) is a kind of Analogy Prime

The proposed strict upward parent is prime:analogy.

Hierarchy paths (2) — routes to 2 parentless roots

Analogy (law) → Analogy → Comparison → Self Checking

Show alternative path (1)

Neighborhood in Abstraction Space¶

Analogy (law) sits in a crowded region of the domain-specific corpus (3^rd percentile for distinctiveness): several abstractions share nearly its structure, so a description that fits it tends to fit its neighbors too.

Family — Legal Interpretation & Doctrine (45 abstractions)

Nearest neighbors

Computed from structural-signature embeddings · 2026-09-08