Evaluating sources and reading opinions

Source Roles: Why a Citation Does Not Carry Its Own Weight

The governing law of this chapter is the disciplined use of legal sources: classify the source, measure its authoritative weight, and fit its rule and dispositive facts to the issue.

This chapter covers Legal Research Tasks 18, 19, and 21: identifying the roles, characteristics, and authoritative weight of a collection of sources; identifying analogous or distinct facts in provided opinions; and identifying sources relevant to or dispositive of an issue. In Foundational Skills items, the governing law is supplied, and the exam measures what the reader does with it. Any task may assess skills from any group, so the grouping shows closest alignment rather than an exclusive boundary. Task 17’s search strategy and Tasks 20 and 22’s extension and sufficiency judgments belong to sibling chapters.

Begin with the source’s role. A constitution, statute, regulation, court rule, or judicial opinion is primary authority: it states or applies law. A treatise, practice guide, law-review article, digest, annotation, blog post, or database summary is secondary authority: it explains, organizes, or points toward law. An affidavit, record excerpt, or party’s email may be important evidence, but a brief is an advocacy filing, not legal authority or evidence merely because it discusses the law.

Then separate authority from reliability. An official court opinion and an accurate database copy may contain the same words, but the copy does not acquire independent legal force. An unofficial copy can be reliable for reading; the issuing tribunal gives the opinion its authority. Likewise, a polished treatise may be excellent research material while remaining nonbinding.

For primary sources, weight depends on the proposition being supported and the legal system in which the question arises. Ask:

• Is the source the governing constitution, statute, regulation, or rule?
• Which court or agency issued it?
• Is that institution authorized to make the relevant law?
• Is the source binding in the forum, or merely persuasive?
• Is the language part of the holding, or only an observation not necessary to the result?
• Does the source address this issue, or only a neighboring one?
• Does its precedential status, procedural posture, or supplied limitation reduce its force?

A state supreme court’s holding on a state statute ordinarily binds lower state courts applying that statute. An intermediate appellate decision may bind lower courts within its jurisdiction unless displaced, but its reach remains limited by its actual holding and any supplied precedential-status instruction. A federal court’s prediction of state law may be highly persuasive without binding the state courts. A court’s statement about a question it did not need to decide is ordinarily dicta, even if the statement sounds broad.

The collection therefore has no single undifferentiated “weight.” One sentence in an opinion may be binding; the next may be persuasive dicta. One source may control the legal rule but say nothing about whether a factual exception applies. Another may be nonbinding yet provide the closest factual analogy.

Task 18 often tests a near miss between a source’s role and its weight. A statute is primary authority, but a statute from another jurisdiction may not govern this dispute. A case is primary authority, but a case deciding a different issue may not resolve the assigned question. A secondary source may be highly relevant because it explains a difficult phrase, yet it cannot replace the controlling text or holding.

The proposition must be stated precisely. “The court discussed notice” is not a proposition. “Notice to the agency, rather than notice to a supervisor, satisfies the statutory reporting requirement” is a proposition. Weight is measured against that proposition, not against the source in the abstract.

Opinion Fit: Find the Fact That Changes the Result

Task 19 is not a search for cases with matching vocabulary. It is a comparison of the facts the court actually used to reach its result. Read a provided opinion in this order.

First, state the issue and posture in one sentence. Ask what the court had to decide and whether it was deciding a motion to dismiss, summary judgment, a trial appeal, or another procedural question. A dismissal opinion may assume pleaded facts without finding them true. A summary-judgment opinion may decide that the evidence is legally insufficient, not that a witness is untruthful. A factual finding after trial may carry a different significance from an allegation assumed for purposes of a motion.

Second, identify the holding, not merely the outcome. The winner does not tell you why the winner prevailed. Look for the rule the court needed in order to affirm or reverse and for the application of that rule to the facts. If the court gave two independent reasons, treat both as possible holdings; changing one fact may leave the other reason intact.

Third, extract the dispositive facts. A dispositive fact is not merely a fact the opinion mentions. It is a fact that, under the court’s reasoning, satisfies or defeats an element, triggers an exception, determines the procedural result, or separates the winning side from the losing side. Use a counterfactual test: if the fact were changed while the other legally important facts remained the same, would the court’s reasoning likely change?

That test has limits. Courts may rely on several facts together, so there may be no single magic fact. If the opinion says the plaintiff loses because the report was both late and outside the protected channel, changing only the timing may not change the result. If the court expressly says “even assuming” a disputed fact, that fact was probably not dispositive for that decision. A vivid fact-an angry email, a large amount of money, or an unusually sympathetic witness-may be narrative background rather than the legal switch.

Fourth, compare the current facts by legal function, not by surface resemblance. A current fact is analogous when it occupies the same legally important position in the rule. It is distinct when the difference maps onto an element, exception, threshold, remedy, or procedural limitation.

Examples of near misses include:

• Two employees both complained, but one complained to the legally designated agency and the other complained only to a supervisor. The shared word “complained” does not make the cases analogous if the reporting channel is an element.
• Two parties acted ten days apart, but one had received formal notice and the other had not. Timing is analogous only if notice is not the operative fact.
• Both opinions involve the same statute, but one decides whether conduct is covered and the other decides whether an exception applies. Subject-matter overlap does not equal issue identity.
• Both cases reach summary judgment, but one turns on an undisputed document and the other on conflicting testimony. The procedural posture is similar, while the material evidentiary facts are distinct.
• Both plaintiffs win, but one opinion rests on a statutory text holding and the other on an independent constitutional ground. The outcomes are analogous only if the reasoning is too.

A case can be relevant without being dispositive. It is relevant if it bears on the issue’s rule, interpretation, element, exception, remedy, or factual application. It is dispositive if its controlling rule and factual application resolve the assigned issue without a material legal or factual gap. Relevance is therefore the wider category.

A binding opinion on an unrelated issue is not dispositive merely because it comes from the highest court. A persuasive opinion with nearly identical facts may be highly relevant, but its lack of binding force prevents it from controlling the forum. A statute may be controlling and potentially dispositive, but the statute alone may not resolve whether the supplied facts satisfy a contested mental-state or exception requirement. Conversely, an opinion applying the statute may answer that precise question.

For a case-law source, the dispositive inquiry proceeds in a fixed order:

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“Match” does not mean identical. It means that the facts the court treated as legally important are present, absent, or materially different in the current problem. A different name, industry, dollar amount, or physical location ordinarily does not matter unless the supplied opinion makes it matter. A different recipient, timing, notice, intent, or procedural posture often does.

The same sequence helps with Task 21. State the exact issue, identify every candidate source, and ask what work each source can do. A source is relevant when it bears on that issue. A source is dispositive when it supplies the controlling rule or controlling application that resolves the issue. Only after that fit analysis should you assign the source’s weight. Calling a source “binding” does not answer whether it addresses the question; calling it “close” does not answer whether it controls.

Recurring errors include:

• Treating Lina’s agency email and a different employee’s supervisor complaint as analogous because both employees “reported” misconduct.
• Treating a discharge within 35 days as automatically unlawful without checking the statute’s good-faith, identification, and independent-reason requirements.
• Treating a state supreme court opinion as merely persuasive because the opinion is fact-specific, even though its legal holding binds the forum within its reach.
• Treating a photograph or later inspection citation as legal authority rather than as facts that may support a required element.
• Treating every sentence in a provided opinion as its holding instead of asking whether the court needed that sentence to decide the case.

One Supplied Record: Separate Authority from Analogy

The following statute is supplied in full. The opinions are also supplied as described in the fact pattern; their court levels and holdings are facts about the source collection.

Workplace Reporting Act

An employer shall not discharge an employee because the employee, in good faith, reports to the State Safety Department conduct the employee reasonably believes violates a workplace-safety requirement. A report is protected only if it identifies the employer and describes the conduct. A discharge is prohibited only when it occurs within 90 days after the report, unless the employer proves that the discharge would have occurred for an independent documented reason.

Three Fast Tests: Weight, Fact Fit, and Direct Effect

High-Yield Points - ⚡ Biggest Takeaways

Separate a source’s legal authority from its reliability and from its relevance to the precise issue. A dispositive fact changes the court’s reasoning; a vivid fact merely appears in the story. Treat a holding as controlling only when its issue and legally material facts reach the supplied problem.