Proven Mnemonics & Acronyms — fast to learn, hard to forget.
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Latin Maxims
HISC (H=Habeas corpus, I=In rem jurisdiction, S=Sua sponte, C=Certiorari) — key Latin legal terms
Habeas · Injunction · Subpoena · Certiorari
Habeas · Injunction · Subpoena · Certiorari
Courts issue writs as formal commands. These four appear constantly — habeas corpus frees the unlawfully detained, injunctions stop conduct, subpoenas compel testimony, and certiorari grants appellate review.
Habeas corpus
"You have the body" — requires a court to examine whether detention is lawful. Cornerstone of personal liberty.
Injunction
Court order compelling or prohibiting an action. Preliminary, temporary restraining order (TRO), or permanent.
Subpoena
"Under penalty" — compels witness to appear (subpoena ad testificandum) or produce documents (duces tecum).
Burden of Proof
BARD (Beyond A Reasonable Doubt — criminal standard) vs. POE (Preponderance Of Evidence — civil standard, more likely than not, greater than 50%)
Beyond A Reasonable Doubt · Preponderance Of Evidence
Beyond A Reasonable Doubt · Preponderance Of Evidence
Criminal cases demand BARD — the highest standard, near certainty of guilt. Civil cases use POE — more likely than not (just over 50%). Think: BARD = bars someone's freedom, POE = pays out money.
BARD
Beyond a Reasonable Doubt — ~95%+ certainty. Used in all criminal prosecutions. Protects against wrongful conviction.
POE
Preponderance of the Evidence — >50% probability. Standard in most civil cases (negligence, contracts, property).
Clear & Convincing
Middle standard — ~75% certainty. Used in fraud, termination of parental rights, civil commitment.
Parties & Standing
PLAIN (P=Plaintiff, L=Lawsuit, A=Adversarial system, I=Issue, N=N-defendant) — parties and standing in litigation
Plaintiff · Liability · Actual injury · Injury traceable · Not speculative
Plaintiff · Liability · Actual injury · Injury traceable · Not speculative
Before a court hears a case, the plaintiff must have standing. PLAIN covers the constitutional minimum: a concrete injury, caused by the defendant, that a court ruling can redress.
Injury-in-fact
Concrete and particularized harm — not hypothetical. Must have actually or imminently occurred.
Causation
The injury must be fairly traceable to the defendant's conduct — not some independent third party.
Redressability
A favorable court decision must be able to remedy the injury. No standing if the ruling won't help.
Latin Terms
RIL (Res Ipsa Loquitur — the thing speaks for itself) — allows inference of negligence from the nature of the accident
Res Ipsa Loquitur — "The thing speaks for itself"
Res Ipsa Loquitur — "The thing speaks for itself"
RIL lets a plaintiff prove negligence indirectly — when the accident itself screams negligence. Classic example: a surgical sponge left inside a patient. The event wouldn't happen without someone's carelessness.
Element 1
The accident normally wouldn't occur without negligence — sponges don't wander into bodies.
Element 2
The instrumentality was under the exclusive control of the defendant at the time of injury.
Element 3
Plaintiff did not contribute to the accident — the harm wasn't self-inflicted.
Precedent
STARE (Stare decisis — let the decision stand) — the doctrine of binding precedent in the common law system
Stare Decisis — "To stand by things decided"
Stare Decisis — "To stand by things decided"
Stare decisis means courts follow prior rulings — binding precedent from higher courts in the same jurisdiction must be followed. STARE = Stay The course And Respect Existing decisions. Predictability + fairness.
Binding precedent
Higher court rulings in the same jurisdiction — must follow. E.g., a state trial court must follow its state supreme court.
Persuasive precedent
Other jurisdictions or lower courts — may consider but not required to follow.
Obiter dictum
"Said in passing" — non-binding commentary in an opinion. Contrast with ratio decidendi (the binding legal reasoning).
Court Structure
TACT (T=Trial courts, A=Appellate courts, C=Courts of last resort/SCOTUS, T=Two parallel systems federal and state)
Trial · Appeals · Circuit · Top (SCOTUS)
Trial · Appeals · Circuit · Top (SCOTUS)
Federal courts have three tiers. TACT helps you climb from the trial level (District Courts) through the 13 Circuit Courts of Appeals to the Supreme Court at the top — with cert petitions the only door to SCOTUS.
District Courts
94 federal trial courts — where cases start. Juries decide facts; judges apply law.
Circuit Courts
13 Courts of Appeals — review legal errors from District Courts. No new evidence; panels of 3 judges.
SCOTUS
9 justices, life tenure. Hears ~80 cases/year from 7,000+ petitions. Final word on federal law.
Latin Terms
IN LOCO PARENTIS (in place of a parent) · PRO SE (representing oneself without an attorney) · AMICUS CURIAE (friend of the court — third party brief)
In place of · For oneself · Friend of the court
In place of · For oneself · Friend of the court
In loco parentis lets schools act as parents. Pro se means someone represents themselves. Amicus curiae briefs let outside parties weigh in. These three pop up across torts, family law, and constitutional cases.
In loco parentis
"In the place of a parent" — duty schools/institutions owe to minors in their care. Grounds many school liability cases.
Pro se
"For oneself" — self-represented litigant. Courts afford some leniency but pro se parties still follow procedural rules.
Amicus curiae
"Friend of the court" — non-party filing a brief to provide relevant expertise or perspective. Common in SCOTUS cases.
Jurisdiction
SMOGG (S=Subject matter jurisdiction, M=Minimum contacts/personal jurisdiction, O=Original vs appellate, G=General vs limited, G=Geographic limits)
Subject matter · Minimum contacts · Original · General · General personal
Subject matter · Minimum contacts · Original · General · General personal
Before a court can act, it must have jurisdiction. SMOGG covers the key types: subject matter jurisdiction (what cases the court can hear), plus personal jurisdiction over the defendant based on contacts with the forum state.
Subject matter
Federal question (arising under federal law/Constitution) or diversity (parties from different states + >$75K).
Minimum contacts
Int'l Shoe test — defendant must have purposefully availed itself of the forum state. Satisfies due process.
Original jurisdiction
Court where case first filed. SCOTUS has original jurisdiction over disputes between states.
Key Distinctions
CVX (C=Civil vs Criminal, V=Void vs Voidable, X=Law vs eXuity/Equity) — key legal distinctions
Civil · versus · Criminal — the core divide
Civil · versus · Criminal — the core divide
Civil law = private disputes, money damages, POE standard, plaintiff sues. Criminal law = state prosecutes, punishment including prison, BARD standard. The same act (e.g., assault) can trigger both — different parties, different outcomes.
State/Government prosecutes Defendant. Remedies: fines, probation, imprisonment. Standard: BARD. Right to counsel.
Double jeopardy
5th Amendment bars being tried twice for the same crime. Does NOT bar parallel civil suit (different sovereign/party).
🎓 Common Exam Questions
Q: What does BARD vs. POE stand for and explain the burdens of proof?
A: BARD (Beyond A Reasonable Doubt) vs. POE (Preponderance Of Evidence): the two main standards of proof. POE (civil standard): more likely than not — greater than 50% probability. The plaintiff must tip the scales just slightly in their favor. Used in all civil litigation. Some civil matters require clear and convincing evidence (intermediate standard, ~75% certainty): fraud, punitive damages, will contests, civil commitment, termination of parental rights. BARD (criminal standard): the prosecution must eliminate all reasonable doubts — not all possible doubts, but doubts based on reason. Roughly 95% certainty. The highest standard in law. Why higher? Because liberty and stigma of criminal conviction are at stake. The presumption of innocence means the defendant need not prove anything — the burden is entirely on the prosecution. BARD derives from the 14th Amendment's due process clause (In re Winship, 1970). Affirmative defenses: in many jurisdictions, once the prosecution proves the crime beyond a reasonable doubt, the defendant bears the burden of proving affirmative defenses (insanity, self-defense) by a preponderance of evidence.
Q: What does HISC stand for and explain the key Latin maxims in law?
A: HISC (Habeas corpus, In rem, Sua sponte, Certiorari): key Latin maxims. Habeas corpus (you shall have the body): a writ requiring the government to bring a prisoner before the court to determine whether the detention is lawful. The great writ of liberty — basis for challenging unlawful imprisonment. In rem (against the thing): jurisdiction over property or status rather than a person — e.g., forfeiture proceedings, probate, admiralty. Sua sponte (on its own motion): a court acting on its own initiative without being asked by either party — e.g., dismissing a case for lack of jurisdiction sua sponte. Certiorari (to be informed): the writ by which higher courts (especially the US Supreme Court) agree to review lower court decisions. SCOTUS grants certiorari by the Rule of Four — four justices must agree to hear the case. Other key terms: Res ipsa loquitur (RIL — the thing speaks for itself): in negligence, allows inference of negligence from the nature of the accident (e.g., surgical instrument left in patient). In loco parentis (in place of a parent): legal authority to act as a parent.
Q: What does TACT stand for and explain the federal and state court systems?
A: TACT (Trial courts, Appellate courts, Courts of last resort/SCOTUS, Two parallel systems): Two parallel court systems operate in the US. Federal courts: US District Courts (trial level, 94 districts), US Courts of Appeals (13 circuits, 3-judge panels for most cases), US Supreme Court (9 justices, discretionary review via certiorari — accepts about 80 cases per year out of 7,000 petitions). Federal courts hear: federal questions (claims under federal law, Constitution, treaties), diversity jurisdiction ($75,000+, complete diversity between parties), exclusive federal matters (bankruptcy, patents, securities law). State courts: trial courts (may be divided into limited and general jurisdiction), intermediate appellate courts, state supreme courts. State courts hear: vast majority of all litigation — contracts, torts, family law, property, criminal law. Appeals from state courts to SCOTUS: only when a federal constitutional or statutory question is raised. Concurrent jurisdiction: both federal and state courts can hear diversity cases and some federal claims.
Q: What does STARE stand for and explain how precedent works in the common law system?
A: STARE (Stare decisis — let the decision stand): the doctrine that courts follow prior decisions on the same legal issue to promote predictability, fairness, and stability in the law. Binding (mandatory) precedent: decisions from a higher court in the same jurisdiction must be followed by lower courts. A federal district court must follow its circuit's Court of Appeals decisions. All courts must follow US Supreme Court decisions on federal law. Courts are NOT bound by decisions from other jurisdictions (these are persuasive, not binding). Persuasive authority: decisions from other jurisdictions, secondary sources (treatises, law review articles), and lower court decisions within the same jurisdiction that the court may consider but need not follow. Overruling: a court can depart from its own precedent — the Supreme Court can overrule itself (Brown v. Board overruled Plessy; Dobbs overruled Roe). Lower courts cannot overrule higher court decisions. Distinguishing: a court can decline to follow precedent by finding the facts are materially different — allowing flexibility within the common law system. This is called distinguishing the case.
Q: Explain the adversarial system and how courts apply IRAC (Issue, Rule, Analysis, Conclusion).
A: The adversarial system: the Anglo-American legal tradition where opposing parties present their best arguments, evidence, and legal theories to a neutral decision-maker (judge and/or jury). The theory: truth is best discovered through vigorous competition between opposing sides. Contrasts with the inquisitorial system (civil law countries — France, Germany) where judges actively investigate and question witnesses. IRAC (Issue, Rule, Analysis, Conclusion): the standard framework for legal analysis. Issue: identify the precise legal question (e.g., did the defendant's conduct constitute breach of contract?). Rule: state the applicable legal rule (e.g., breach occurs when a party fails to perform a contractual obligation without legal excuse). Analysis: apply the rule to the specific facts — this is where the work is done. Address each element, discuss both sides, deal with ambiguities. Conclusion: answer the issue question. FIRAC adds Facts at the beginning. Used in law school exams, legal memos, and briefs. The most important skill in law: identifying the correct issue and accurately applying the rule to the facts.