Materiality of a new circumstance determines whether precedent extends to analogous facts.

Evidence

If A has been found to be liable in set of circumstances (facts) B, we have to decide, often without an exact precedent to guide us, whether A is also liable if B obtains plus or minus circumstance C. To do this we determine if the additional circumstance is material. — Ruggero J. Aldisert, Agatha D. Aldisert, Logic for Lawyers- A Guide to Clear…, 1292

Categorization

• DEFINE: Defines the core legal reasoning operation: deciding whether an added or missing circumstance C is material before extending a prior holding.
• corroborated: 2 independent passages support this claim — Ruggero J. Aldisert, Agatha D. Aldisert, Logic for Lawyers- A Guide to Clear…, 1292
• XREF: connects to: Legal analogy argues from particular facts to particular consequences based on similarities — Ruggero J. Aldisert, Agatha D. Aldisert, Logic for Lawyers- A Guide to Clear…, 547; Advocates debate whether case factual similarities are legally material — Ruggero J. Aldisert, Agatha D. Aldisert, Logic for Lawyers- A Guide to Clear…, 581; A case precedent only holds for the precise issue before it — Ruggero J. Aldisert, Agatha D. Aldisert, Logic for Lawyers- A Guide to Clear…, 1237 (+10 more)

Broader Connections

• A case is precedent only when material facts match exactly #qualifies (0.60) — Ruggero J. Aldisert, Agatha D. Aldisert, Logic for Lawyers- A Guide to Clear…, 1299
• The scope and meaning of legal rules depend on factual similarities #corroborates (0.60) — Ruggero J. Aldisert, Agatha D. Aldisert, Logic for Lawyers- A Guide to Clear…, 151
• A judicial precedent attaches specific legal consequences to detailed case facts. #expands (0.55) — Ruggero J. Aldisert, Agatha D. Aldisert, Logic for Lawyers- A Guide to Clear…, 131
• Valid legal analogies depend on relevant similarities rather than case quantities #qualifies (0.55) — Ruggero J. Aldisert, Agatha D. Aldisert, Logic for Lawyers- A Guide to Clear…, 343
• Deductive legal analysis applies established characteristic propositions to new cases #expands (0.50) — Ruggero J. Aldisert, Agatha D. Aldisert, Logic for Lawyers- A Guide to Clear…, 680
• Common law rules arise from comparing cases, not from tracing prior logic #expands (0.50) — Burton, Steven J, An Introduction to Law and Legal…, 222
• Legal analogy requires a theoretical basis rather than mere perception #expands (0.50) — Ruggero J. Aldisert, Agatha D. Aldisert, Logic for Lawyers- A Guide to Clear…, 608