Supreme Court opinions are written explanations of how the Court decides a case and why that decision matters. They guide lower courts, government officials, lawyers, and the public in understanding the Constitution and federal law. A single case can produce more than one opinion because the justices may agree on the result for different reasons or disagree entirely.
Learning the opinion types helps students read landmark cases with more confidence.
Key Facts
- A majority opinion states the Court’s official judgment and the legal reasoning supported by more than half of the justices who participate.
- A concurring opinion agrees with the result of the case but gives different or additional reasoning.
- A dissenting opinion disagrees with the Court’s result and explains why the dissenting justice or justices believe the majority is wrong.
- A per curiam opinion is issued in the name of the Court rather than a specific justice, often for a brief or unsigned decision.
- With 9 participating justices, at least 5 votes are usually needed for a majority decision.
- Only the holding of the Court, usually found in the majority opinion, creates binding precedent for lower courts.
Vocabulary
- Majority opinion
- The written opinion that explains the Court’s official decision when more than half of the participating justices agree on the outcome and reasoning.
- Concurring opinion
- A separate opinion written by a justice who agrees with the outcome but wants to explain a different or additional reason.
- Dissenting opinion
- A separate opinion written by a justice who disagrees with the Court’s decision and explains the opposing view.
- Per curiam opinion
- An opinion issued by the Court as a whole, usually without naming one justice as the author.
- Precedent
- A legal rule or principle from an earlier court decision that guides future cases with similar issues.
Common Mistakes to Avoid
- Calling every opinion in a case the majority opinion. This is wrong because concurring and dissenting opinions may appear in the same case but do not all state the Court’s controlling rule.
- Assuming a concurring justice disagrees with the outcome. This is wrong because a concurrence agrees with who wins but may disagree about the legal reasoning.
- Treating a dissent as binding law. This is wrong because dissents can influence future debates, but they do not control lower courts in the current case.
- Thinking per curiam always means the case is unimportant. This is wrong because some per curiam opinions can address important legal issues even when no single author is listed.
Practice Questions
- 1 In a case with 9 participating justices, 5 join one opinion, 2 write a concurrence, and 2 dissent. Which opinion is the majority opinion, and how many justices supported the Court’s controlling reasoning?
- 2 In a case with 8 participating justices, 4 justices vote for one outcome and 4 vote for the opposite outcome. If the lower court judgment is affirmed by an equally divided Court, how many justices formed a majority opinion?
- 3 A justice agrees that a student’s speech rights were violated but believes the majority used the wrong constitutional test. What type of opinion would that justice most likely write, and why?