Judicial Interpretation

PLA 2880Activity 6·9 min read

Why it Matters

The words of the Constitution don’t interpret themselves. Every constitutional decision, from free speech to marriage to gun rights, reflects a choice about what the text means, how it applies, and who gets to decide. Those choices are shaped by competing philosophies of judicial interpretation. Some justices hold that we must stick closely to the Constitution’s original meaning at the time it was written, while others hold that the Constitution must evolve with society and be read in light of current values and realities. These approaches, commonly called originalism and living constitutionalism, often produce very different outcomes from the same words, and learning to see the philosophy behind a holding is what lets you read a Supreme Court opinion as an argument rather than a verdict.

Current Context

In June 2026 the Court decided Wolford v. Lopez, striking down 6-3 a Hawaii law that barred concealed carry permit holders from bringing handguns onto private property open to the public without the owner’s consent. Justice Alito’s majority and Justice Kagan’s dissent worked from the same colonial and founding-era sources and reached opposite conclusions about what that history establishes, a split the National Constitution Center’s summary captures in the Justices’ own words. The same week, the Court agreed to hear a consolidated challenge to assault weapons bans next term. Two sets of Justices, one historical record, two answers: the interpretive fault line this activity teaches you to see is on the front page right now.

Key Concepts

Originalism

A method of constitutional interpretation that applies the original public meaning of the text as it was understood at the time of ratification. Originalists look to founding-era dictionaries, debates, and practices to fix a provision’s meaning, and they treat that meaning as binding until the text is formally amended. Justice Scalia’s majority in Heller is a leading example.

Living Constitutionalism

An interpretive philosophy that treats the Constitution as a dynamic document whose meaning can develop over time. On this view, broad phrases like “liberty” and “equal protection” were written to be applied to conditions the founders could not foresee, so courts read them in light of evolving social understanding. Justice Kennedy’s majority in Obergefell reflects this approach.

Stare Decisis

The principle that courts should follow precedent to keep the law consistent and stable. It is not absolute: the Supreme Court can overturn a prior decision when it concludes the case was wrongly decided or has become unworkable, which is why debates over interpretation often turn into debates over when precedent should yield.

Majority Opinion

The official ruling of the Court, joined by more than half of the participating justices. It states the decision, lays out the reasoning, and establishes the legal rule that binds lower courts. When you want to know what the law now is, this is the opinion that supplies it.

Dissenting Opinion

An opinion by one or more justices who disagree with the majority’s result. A dissent explains why its authors think the majority erred and often speaks to future courts, since more than one dissent has later become the law. Reading the dissent alongside the majority shows you where the real interpretive fault line runs.

Concurring Opinion

An opinion by a justice who agrees with the majority’s outcome but reaches it through different reasoning. A concurrence may propose an alternative legal path or stress a point the majority left underdeveloped, as Justice Thomas did in McDonald by grounding the right in the Privileges or Immunities Clause rather than substantive due process.

Resources

US Constitution (Constitution Annotated) (The text every opinion in this activity is arguing about; keep the Second Amendment and the Fourteenth Amendment open as you read.)
Modes of Constitutional Interpretation (CRS Report R45129) (A neutral Congressional Research Service overview of originalism, living constitutionalism, and the other interpretive methods; the best single primer on the frameworks.)
District of Columbia v. Heller (Cornell LII) (2008. Recognized an individual right to keep and bear arms. Read Justice Scalia’s majority for originalist reasoning from the amendment’s public meaning, and Justice Stevens’s dissent for a history-and-function reading tied to militia service.)
McDonald v. City of Chicago (Oyez) (2010. Applied the Second Amendment right against the states through the Fourteenth Amendment. Focus on Justice Thomas’s concurrence, which argues the right belongs under the Privileges or Immunities Clause, an originalist path outside the majority’s framework.)
Obergefell v. Hodges (Oyez) (2015. Held that the Constitution guarantees a right to same-sex marriage. Read Justice Kennedy’s majority for a living-constitutionalist emphasis on dignity and evolving liberty, and Justice Scalia’s dissent for an originalist critique centered on judicial restraint.)
Obergefell v. Hodges (Cornell LII full text) (The complete set of opinions if you want to read Kennedy’s majority and the dissents in full rather than in summary.)
Ramos v. Louisiana (Constitution Annotated) (2020. Held that the Sixth Amendment requires unanimous jury verdicts, overruling Apodaca v. Oregon. Read Justice Gorsuch’s majority for original-meaning method deployed to overturn precedent, and the separate opinions for a live debate over when stare decisis should yield; pull the full opinions from Google Scholar below.)
Google Scholar (Full opinions for these cases; Westlaw via the Daytona State library gives you the annotated versions.)

What to Do

In this activity you’ll engage with three landmark Supreme Court cases, District of Columbia v. Heller, McDonald v. City of Chicago, and Obergefell v. Hodges, to see how justices interpret the Constitution and how majority, dissenting, and concurring opinions reveal different judicial philosophies. You don’t need to read every case word for word, but you do need to read closely across the three: at least one majority opinion, one dissent, and one concurrence, so you get a feel for how justices write, reason, and disagree. The AI prompts are here to help you think, not to read the opinions for you. Treat the three cases as specimens of interpretive method rather than doctrine to master; Activity 7 returns to McDonald for incorporation and Activity 9 returns to Obergefell for the substantive law.

Part 1: Read the Opinions

For Heller, read Justice Scalia’s majority for its originalist reasoning and Justice Stevens’s dissent for a contrasting interpretive approach. For McDonald, read the majority to understand how a right gets incorporated against the states, then turn to Justice Thomas’s concurrence and his use of the Privileges or Immunities Clause. For Obergefell, read Justice Kennedy’s majority for its living-constitutionalist method and Justice Scalia’s dissent as a critique grounded in originalism and judicial restraint. Take notes as you go, and focus less on the legal jargon than on how each justice reasons through the Constitution: which words they lean on, what history they cite, and how they frame the role of the Court. If you want to watch stare decisis put to work rather than described, skim the opinions in Ramos v. Louisiana as a fourth read; the majority and the separate opinions argue openly about when precedent should fall.

Part 2: Use the AI Prompts

Use the Interpretation Essayist to build a working understanding of originalism and living constitutionalism before or alongside your reading. Then run the Case Philosophy Analyzer on one of the three cases to test how well you can classify its opinions, and check its verdict against your own notes from Part 1. Use the Cross-Philosophy Critic to pressure-test both frameworks by turning each one against a case it would normally endorse. Treat every prompt’s output as a draft to verify, not an answer to copy, and confirm any quotation the model attributes to a justice against the actual opinion text.

Part 3: Write Your Reflection (400–600 words)

Explain what you learned about how justices interpret the Constitution by comparing the majority, dissenting, and concurring opinions across the three cases. Then take a position of your own: should the Constitution be read as fixed or as evolving, and should courts play a limited or an active role? Support your view with one specific example from the cases, and note anywhere the AI’s analysis needed correcting against what you found in the opinions themselves.

Include one AI chat link with a 1–2 sentence explanation of what the conversation shows and why you chose to share it.

Suggested AI Prompts

Use these prompts as a starting point, then adjust them to fit your goal. Strong prompting develops through trial, revision, and testing. It’s a foundational skill that grows into more advanced AI work such as context engineering and agent-based workflows.

The Interpretation Essayist

Write a thorough, academic essay that helps a college student in a constitutional law course understand how judicial interpretation shapes U.S. Supreme Court decisions. Focus on how interpretive methods drive constitutional reasoning, with particular attention to the two main approaches, originalism and living constitutionalism. Define and contrast these frameworks using appropriate constitutional law terminology, and illustrate how each has guided the Court’s analysis in key cases throughout history. Include discussion of how majority, concurring, and dissenting opinions can each reflect a different interpretive philosophy. Analyze the broader implications of these methods for legal predictability, social change, and the evolving role of the judiciary. Keep the writing formal, clear, and accessible to undergraduates, avoiding oversimplification while maintaining academic rigor, and structure the response as a coherent multi-paragraph essay of at least 1200 words. Where you attribute a position to a specific justice or case, name it precisely so I can verify it.

This prompt asks for a long structured essay and specifies audience, length, and terminology up front, which is how you get usable academic prose instead of a shallow overview. The closing line, requiring named attributions, turns a broad explainer into something you can fact-check case by case.

The Case Philosophy Analyzer

You are a constitutional law tutor who analyzes any U.S. Supreme Court case through the lens of judicial interpretation. Begin by asking me for the name of a case. Once I provide it, generate a detailed, academic-style analysis evaluating whether the Court’s reasoning reflects originalism, living constitutionalism, or neither. Define both interpretive methods using appropriate constitutional law terminology, then assess how the majority, concurring, and dissenting opinions each align with those frameworks. If the case does not clearly embody either philosophy, explain why rather than forcing it into a category, and account for any complexity or ambiguity in the Court’s reasoning. Write in a formal, accessible style suited to undergraduate constitutional law students, and tell me directly if you are uncertain about how a particular opinion should be classified.

This is a rewrite of a first-person prompt into a role instruction the model can act on, which is worth noticing on its own: assigning the AI a role (“You are a tutor who…”) tends to produce more consistent behavior than describing what it will do. The permission to answer “neither” and to flag uncertainty guards against the model’s habit of sorting every case into a tidy box it doesn’t actually fit.

The Cross-Philosophy Critic

You are a constitutional law professor running a role-reversal exercise. First, critique Justice Kennedy’s majority opinion in Obergefell v. Hodges from a committed originalist standpoint, laying out the strongest originalist objections to its method and result. Then critique Justice Scalia’s majority opinion in District of Columbia v. Heller from a committed living-constitutionalist standpoint, laying out the strongest objections that approach would raise. Argue each critique in good faith rather than knocking down a weak version. When you quote or paraphrase either opinion, mark clearly which it is, and note that I will check every quotation against the actual opinion text, so quote directly only when you are confident of the wording and label anything reconstructed from memory as a paraphrase to verify.

Turning each framework against a case it would normally support is a way to test whether you understand the philosophy or just the outcome, and asking the model to steelman both sides keeps the exercise from collapsing into your own priors. The instruction to separate quotation from paraphrase targets a real failure mode: models frequently produce confident-sounding “quotations” that no justice ever wrote, and telling it in advance that you will verify makes the flagging honest.