📚 Year 11 CAIE Law: Quick Reference Guide to Legal Principles and Maxims | 法律原则与格言速查手册
For Year 11 CAIE Law students, having a concise collection of the most important legal principles, definitions, and case law rules is essential for revision. This quick reference guide acts like a 'formula sheet' for law, summarising the key building blocks you need to tackle problem questions and essays with confidence. Each section presents an English explanation immediately followed by its Chinese equivalent so you can grasp the concept fully in both languages.
对于学习 Year 11 CAIE 法律课程的学生来说，拥有一份简洁的重要法律原则、定义和判例规则集锦是复习的关键。这份速查手册就像法律的“公式表”，总结了你需要有信心应对案例题和论述题的核心模块。每个部分都先给出英文解释，紧接着提供中文对译，让你能充分掌握中英双语的概念。
1. Actus Reus – The Guilty Act | 犯罪行为——有罪的行为
Actus reus refers to the physical element of a crime. It can be an act, an omission (where a duty to act exists), or a state of affairs. The act must be voluntary. Omissions only lead to liability when there is a legal duty, such as a contractual duty (Pittwood), a duty arising from a special relationship (Gibbins and Proctor), or a duty created by the defendant's own conduct (Miller). For result crimes, the prosecution must prove that the defendant's conduct caused the prohibited consequence.
犯罪行为（actus reus）是指犯罪的外在行为要素。它可以是作为、不作为（当存在作为义务时）或某种状态。行为必须是自愿的。不作为只有在存在法律义务时才会导致责任，例如合同义务（Pittwood 案）、特殊关系产生的义务（Gibbins and Proctor 案）或被告自身行为产生的义务（Miller 案）。对于结果犯，控方必须证明被告的行为导致了被禁止的后果。
In strict liability offences, actus reus alone can be sufficient without proof of a guilty mind.
在严格责任犯罪中，仅存在犯罪行为即可，无需证明有罪的心理状态。
2. Mens Rea – The Guilty Mind | 犯罪意图——有罪的心理
Mens rea is the mental element of a crime. The main types are intention, recklessness, negligence, and knowledge. Direct intention means the defendant's aim or purpose was to bring about a result (Mohan). Oblique intention applies when the result was a virtually certain consequence of the defendant's act, and the defendant appreciated that fact (Woollin). Recklessness is taking an unjustified risk, assessed subjectively: was the defendant aware of the risk and went on to take it anyway? (Cunningham).
犯罪意图（mens rea）是犯罪的心理要素。主要类型包括蓄意、轻率、疏忽和明知。直接故意指被告的目的或意图是实现某一结果（Mohan 案）。间接故意适用于结果实际上是被告行为的必然结果，且被告认识到这一事实（Woollin 案）。轻率是主观判断的：被告是否意识到风险仍然一意孤行？（Cunningham 案）。
For some crimes, gross negligence manslaughter requires a very high degree of negligence (Adomako). Transferred malice allows mens rea to be transferred from the intended victim to the actual victim (Latimer).
对于某些犯罪，严重疏忽致人死亡罪要求极高的疏忽程度（Adomako 案）。转移恶意允许犯罪意图从原定受害人转移到实际受害人（Latimer 案）。
3. Strict Liability | 严格责任
Strict liability offences require no proof of mens rea for at least part of the actus reus. They are usually regulatory or quasi-criminal offences dealing with matters of social concern such as food safety, pollution, and licensing. The principle was established in cases like Callow v Tillstone and Harrow LBC v Shah. The absence of a requirement to prove fault is justified by the need to protect the public and encourage vigilance.
严格责任犯罪不要求对犯罪行为的至少一部分证明犯罪意图。它们通常是管理性或准刑事犯罪，涉及食品安全、污染和执照等社会关注问题。这一原则在 Callow v Tillstone 和 Harrow LBC v Shah 等案件中得以确立。免于证明过错的正当理由在于保护公众并鼓励高度警惕。
Yet strict liability is controversial because a person may be convicted even if they took all reasonable precautions. Defences like 'due diligence' exist only if provided by statute.
然而，严格责任存在争议，因为即使一个人采取了所有合理的预防措施，仍可能被定罪。诸如“尽职调查”的抗辩只有在法律有规定时才存在。
4. Duty of Care in Negligence | 过失侵权中的注意义务
The tort of negligence requires a duty of care, breach of that duty, and damage caused by the breach. The neighbour principle from Donoghue v Stevenson holds that you must take reasonable care to avoid acts or omissions that you can reasonably foresee would be likely to injure your neighbour. Your neighbour is anyone directly affected by your actions. The Caparo three-part test refines this: (1) reasonable foreseeability, (2) proximity, and (3) it must be fair, just and reasonable to impose a duty.
过失侵权行为要求存在注意义务、违反该义务以及因违反义务造成的损害。Donoghue v Stevenson 案确立的邻人原则要求你必须尽合理注意，避免你可以合理预见可能会伤害你邻人的作为或不作为。你的邻人指任何直接受到你行为影响的人。Caparo 案的三步检验法对其进行了细化：(1) 合理可预见性，(2) 关系紧密性，(3) 施加义务必须是公平、公正且合理的。
For public bodies, a duty of care is not imposed automatically; policy considerations often limit liability (Robinson v Chief Constable).
对于公共机构，注意义务不会自动产生；政策考量常常限制其责任（Robinson v Chief Constable 案）。
5. Breach of Duty – The Reasonable Person | 违反义务——理性人标准
Breach of duty is judged by the standard of the ordinary reasonable person (Blyth v Birmingham Waterworks). The defendant is expected to act as a reasonably prudent person would in the circumstances. Factors that raise or lower the standard include the likelihood of harm (Bolton v Stone), the seriousness of potential injury (Paris v Stepney BC), the cost and practicality of taking precautions (Latimer v AEC), and the social utility of the defendant's activity (Watt v Hertfordshire CC).
违反义务的判断标准是普通理性人的标准（Blyth v Birmingham Waterworks 案）。被告被期待像理性谨慎的人处于相同情形下那样行事。提高或降低标准的因素包括：损害的可能性（Bolton v Stone 案）、潜在伤害的严重性（Paris v Stepney BC 案）、采取预防措施的成本和可行性（Latimer v AEC 案）以及被告行为的社会效益（Watt v Hertfordshire CC 案）。
Professionals are held to the standard of a reasonably competent practitioner in their field (Bolam). Learners and children are assessed according to what is reasonable for a person of that age or experience.
专业人士应达到其领域内合理称职从业者的标准（Bolam 案）。学习者和未成年人则根据与其年龄或经验相当的理性标准来评判。
6. Causation in Tort and Crime | 侵权与刑法中的因果关系
Causation has two parts: factual causation ('but for' test) and legal causation (remoteness). Factual causation asks: but for the defendant's breach, would the damage have occurred? (Barnett). Legal causation considers whether the defendant's conduct was the operative and substantial cause of the damage. An intervening act (novus actus interveniens) may break the chain of causation. The defendant must take the victim as they find them (thin skull rule, Smith v Leech Brain).
因果关系包括两部分：事实因果关系（“若无则不”检验）和法律因果关系（间接性）。事实因果关系询问：如果不是由于被告的过失，损害是否仍会发生？（Barnett 案）。法律因果关系考查被告的行为是否是造成损害的实质性有效原因。介入行为（新介入行为）可能打破因果链条。被告必须接受受害者原有的特定体质（薄颅骨规则，Smith v Leech Brain 案）。
In criminal law, the same principles apply, with emphasis on the operating and substantial cause test (R v Cheshire). Medical intervention rarely breaks the chain unless it is palpably wrong and makes the original wound merely part of the background.
在刑法中，同样的原则适用，强调有效与实质原因检验（R v Cheshire 案）。医疗干预很少打破因果链条，除非它明显错误并使原初伤害仅仅成为背景的一部分。
7. Offer and Acceptance – Contract Formation | 要约与承诺——合同的成立
A binding contract requires offer, acceptance, consideration, and an intention to create legal relations. An offer is an expression of willingness to contract on specific terms, made with the intention that it will become binding upon acceptance. It must be communicated and can be made to an individual, a group, or the world at large (Carlill v Carbolic Smoke Ball). An invitation to treat is not an offer but an invitation to negotiate (Fisher v Bell, Partridge v Crittenden).
一个有约束力的合同要求要约、承诺、对价和建立法律关系的意图。要约是以特定条款缔约的意愿表达，并意图一旦承诺即受约束。要约必须传达，可以向个人、群体或全世界作出（Carlill v Carbolic Smoke Ball 案）。要约邀请不是要约，而是邀请谈判（Fisher v Bell 案，Partridge v Crittenden 案）。
Acceptance must be a mirror image of the offer; otherwise it is a counter-offer (Hyde v Wrench). Acceptance must be communicated (Entores). The postal rule provides that acceptance by post takes effect when the letter is posted, even if it never arrives (Adams v Lindsell).
承诺必须完全对应要约，否则即构成反要约（Hyde v Wrench 案）。承诺必须有传达（Entores 案）。邮寄规则规定，以邮寄方式承诺的，一经投邮即生效，即使信件从未到达（Adams v Lindsell 案）。
8. Consideration – The Price of a Promise | 对价——承诺的代价
Consideration is what each party gives or promises to give in exchange for the other's promise. It must move from the promisee but not necessarily to the promisor. Consideration must be sufficient but need not be adequate (Thomas v Thomas). Past consideration is generally no consideration (Re McArdle). However, an act done at the promisor's request with an implied promise to pay can be valid (Lampleigh v Braithwaite).
对价是每一方当事人为交换对方的承诺而给予或承诺给予的东西。对价必须来自受诺人，但不一定流向允诺人。对价必须充分但不必对等（Thomas v Thomas 案）。过去的对价一般不是对价（Re McArdle 案）。但是，如果某项行为是应允诺人的要求而为，且默示地存在支付承诺，则可能有效（Lampleigh v Braithwaite 案）。
Performance of an existing duty owed to a third party can be good consideration (Scotson v Pegg). Part payment of a debt is not satisfaction for the whole unless there is fresh consideration at the creditor's request (Pinnel's Case). The rule in Williams v Roffey allows a practical benefit to serve as consideration for the modification of an existing contract.
履行对第三方的现有义务可以构成有效对价（Scotson v Pegg 案）。部分偿还债务不能抵销全部债务，除非在债权人要求下提供了新的对价（Pinnel's Case 案）。Williams v Roffey 规则允许一个实际利益作为修改现有合同的对价。
9. Terms of a Contract – Conditions and Warranties | 合同条款——条件条款和担保条款
Contractual terms can be express or implied. Express terms are those the parties have actually stated. Implied terms are read into the contract by statute (e.g., Sale of Goods Act) or by the courts to give business efficacy (The Moorcock) or by custom. Representations made before a contract may become terms if the parties intended them to be binding (Heilbut, Symons & Co). Terms are classified as conditions (fundamental terms, breach allows termination) or warranties (minor terms, breach gives damages only).
合同条款可以是明示的或默示的。明示条款是当事人实际表述的内容。默示条款是由成文法（如《货物销售法》）或法院为赋予商业效力（The Moorcock 案）或根据惯例而纳进合同的。合同成立前的陈述如果当事方意图使其具有约束力，则可能成为条款（Heilbut, Symons & Co 案）。条款分为条件条款（根本性条款，违反可解除合同）和保证条款（次要条款，违反只能请求损害赔偿）。
An innominate term approach looks at the effect of the breach to determine whether it substantially deprives the injured party of the whole benefit (Hong Kong Fir Shipping).
中间条款的处理方式则考察违约的后果，以决定是否在实质上剥夺了受害方的全部合同利益（Hong Kong Fir Shipping 案）。
10. Exclusion Clauses – Limiting Liability | 免责条款——限制责任
An exclusion clause seeks to limit or exclude a party's liability for breach of contract or negligence. For such a clause to be effective, it must be incorporated into the contract by signature (L'Estrange v Graucob), by reasonable notice (Parker v South Eastern Railway), or by a consistent course of dealing. It must also cover the loss that occurred, interpreted contra proferentem (against the person relying on it) when ambiguous.
免责条款旨在限制或免除一方因违约或过失而产生的责任。要使这类条款有效，必须通过签名（L'Estrange v Graucob 案）、合理通知（Parker v South Eastern Railway 案）或连续交易过程而纳入合同。该条款还必须涵盖已发生的损失，当条款含糊不清时，将作不利于依赖方（contra proferentem）的解释。
The Unfair Contract Terms Act 1977 and Consumer Rights Act 2015 impose statutory controls: business-to-business clauses excluding liability for death or personal injury from negligence are void; other exclusion clauses must satisfy the test of reasonableness.
《1977年不公平合同条款法》和《2015年消费者权益法》施加了法定控制：企业之间涉及因过失导致死亡或人身伤害的免责条款无效；其他免责条款必须满足合理性检验。
11. Latin Maxims – Core Legal Principles | 法律格言——核心法律原则
Latin maxims capture enduring principles of law. 'Actus non facit reum nisi mens sit rea' means the act does not make a person guilty unless the mind is also guilty. 'Novus actus interveniens' is a new intervening act that breaks the chain of causation. 'Res ipsa loquitur' (the thing speaks for itself) assists a claimant in proving negligence when the accident would not normally happen without negligence. 'Volenti non fit injuria' means to a willing person, no injury is done, a defence of voluntary assumption of risk.
拉丁法律格言概括了长盛不衰的法律原则。“Actus non facit reum nisi mens sit rea”指仅有行为而无罪过心智不构成犯罪。“Novus actus interveniens”是打破因果链条的新介入行为。“Res ipsa loquitur”（事实自证）帮助原告在若无过失事故通常不会发生的情况下证明过失。“Volenti non fit injuria”意即对自愿者不构成损害，是自愿承担风险的抗辩。
'Caveat emptor' means let the buyer beware, a principle that has been substantially modified by consumer law. 'Uberrimae fidei' (utmost good faith) applies to contracts of insurance, requiring full disclosure.
“Caveat emptor”意为买方自行当心，这一原则已被消费者法律大幅修正。“Uberrimae fidei”（最大诚信）适用于保险合同，要求全面披露。
12. Defences in Criminal and Tort Law | 刑法与侵权法的抗辩
Common defences in criminal law include self-defence, duress, necessity, intoxication, and consent. Self-defence requires the defendant to honestly believe in the need to use force, and the force used must be reasonable in the circumstances (Palmer). Duress by threats (Hasan) and duress of circumstances (Pommell) are defences where the defendant reasonably fears death or serious injury and a sober person of reasonable firmness would have acted similarly. Intoxication can negate specific intent where the defendant lacked the mens rea (Majewski).
刑法中常见的抗辩包括正当防卫、胁迫、紧急避险、醉酒和同意。正当防卫要求被告诚实相信有使用武力的必要，且使用的武力在相关情况下是合理的（Palmer 案）。胁迫性威胁（Hasan 案）和情境胁迫（Pommell 案）是抗辩，当被告合理恐惧死亡或严重伤害，且清醒的合理坚定之人也会如此行为时可以成立。醉酒可以否定特定故意，此时被告缺乏犯罪意图（Majewski 案）。
In tort, the main defences to negligence are contributory negligence (reducing damages proportionately) and volenti (a complete defence if the claimant freely agreed to accept the risk). The Law Reform (Contributory Negligence) Act 1945 allows courts to apportion loss where the claimant was partly at fault.
在侵权法中，过失的主要抗辩是共同过失（按比例减少损害赔偿）和自愿承担风险（若原告自愿同意接受风险，则为完全抗辩）。《1945年法律改革（共同过失）法》允许法院在原告有部分过错时分担损失。
Published by TutorHao | Law Revision Series | aleveler.com
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