LAWS8001 Chap.4 Precedent, Ratio and Persuasive Authority
Precedent, Ratio and Persuasive Authority
Precedent analysis separates institutional status from factual fit. First identify the earlier court, later court and relevant hierarchy. Then formulate the earlier ratio and ask whether the present issue and material facts fall within its reach. A binding case can be distinguished when a legally material difference changes the reasoning.
A persuasive case can be closely analogous without becoming binding.
Distinguishing requires more than listing differences. The answer must show why a factual or legal difference affects the rule's application.
The same discipline applies to persuasive authority: identify why the reasoning deserves weight, such as institutional standing, careful analysis or close statutory language, and test it against controlling law.
Multiple judgments require a map of outcome and reasoning. Agreement on the order does not necessarily establish agreement on one rationale.
Count support for the legal proposition and avoid assembling fragments into a majority that no group of judges adopted.
What this chapter covers
- 01
Court hierarchy
- 02
Binding ratio
- 03
Material similarity
- 04
Distinguishing
- 05
Persuasive weight
- 06
Multiple judgments
Worked example · free
Distinguish a known defect from a sudden spill
- 1State the earlier ratio from the majority reasons.
- 1Confirm the hierarchy and binding status.
- 1Identify notice and response time as candidate material facts.
- 2Explain why those facts alter the rule's application.
- 1State the remaining principle cautiously.
Key terms
- Stare decisis
- The doctrine under which applicable binding precedent is followed.
- Binding precedent
- A controlling ratio within the relevant hierarchy and issue.
- Persuasive authority
- Non-binding reasoning considered for its relevance and quality.
- Distinguishing
- Explaining why a material difference places a later dispute outside an earlier ratio.
- Dissent
- Reasons of a judge who disagrees with the court's controlling outcome or rationale.
Precedent, Ratio and Persuasive Authority FAQ
Can a binding case be distinguished?
Yes. Binding status concerns the authority of the ratio, while application concerns whether the later issue and material facts fall within it. A distinction is valid only when the identified difference changes the legal reasoning, not merely because the stories differ.
Can a persuasive case be followed?
A court may adopt persuasive reasoning when it is compatible with binding law and convincing in context. The answer should identify why the source deserves weight, such as close wording, institutional standing or careful analysis, while describing its status accurately.
How do I find a majority ratio?
Map each judgment's outcome and necessary reasoning. Count agreement on the proposition, not merely on the order. If judges reach the same result through different paths, state the narrower common ground cautiously and avoid combining reasons no majority shared.
What makes a factual difference material?
A difference is material when it affects an element, condition, policy or inference used in the earlier reasoning. Explain the connection explicitly. A changed date, colour or location does not matter unless the ratio depends on it.
How should I deal with several judgments in one case?
Identify which judges formed the majority and whether they agreed on the proposition relevant to your issue. Do not create a single ratio by blending incompatible reasons. Record concurring routes separately, and treat dissent as persuasive analysis unless later authority gives it a different role.
When is an older authority still useful?
Age alone neither destroys nor establishes authority. Check whether a later court has followed, confined, distinguished or overruled the proposition, and whether legislation has changed its foundation. An older decision may remain controlling, illustrate doctrinal development or supply persuasive reasoning, but the answer must explain which role it performs.
Exam move
Use an authority comparison table with columns for court, issue, material facts, ratio, later treatment and present relevance. Fill the status columns before deciding whether the case helps a party. This prevents strong factual resemblance from being mistaken for binding force.
Practise distinction with paired hypotheticals. Change one fact at a time and write why it does or does not alter the ratio's application.
If the explanation ends at the words different facts, continue until the legal consequence is clear. Repeat with a statutory amendment to see how legal rather than factual change affects precedent.
For multiple judgments, create a judge-by-judge map. Record outcome and necessary reasoning, then identify the proposition supported by the required majority.
Treat dissents as persuasive and check later treatment through a citator. End each answer with the effect on the present issue: apply, distinguish or consider persuasively, followed by the reason.
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