📚 Year 11 Edexcel Law: Formula & Theorem Quick-Reference Handbook | 法律公式定理速查手册
This quick-reference handbook distils key principles of English law, covered in the Edexcel GCSE syllabus, into memorable formulas and theorems. Each entry captures the essential legal 'equation' you need to apply in problem-solving scenarios, helping you structure your answers with precision and confidence.
这本速查手册将爱德思GCSE法律课程中的英国法核心原则提炼成易记的公式与定理。每一条都是解决情景题时必须运用的法律“方程式”，帮助你精准、自信地组织答案。
1. Criminal Liability Formula | 刑事责任基础公式
Actus Reus + Mens Rea − Defence = Guilt
For almost all offences, the prosecution must prove the defendant committed the guilty act (actus reus) and had the guilty mind (mens rea) at the same time. If a full defence (e.g. self-defence) applies, the equation fails and the defendant is not guilty.
对于几乎所有罪行，控方必须证明被告同时实施了犯罪行为（actus reus）并具有犯罪意图（mens rea）。若存在完整的抗辩理由（如自我防卫），公式不成立，被告无罪。
Actus reus covers all elements of the crime except the mental state — it can be an act, omission, or state of affairs. Mens rea is the mental element, usually intention or recklessness. For many statutory crimes, the actus reus must also be voluntary.
犯罪行为涵盖除精神状态外的所有犯罪要素——可以是作为、不作为或状态。犯罪意图则是主观要素，通常为故意或轻率。在许多制定法罪行中，犯罪行为还必须是自愿的。
2. Strict Liability Formula | 严格责任公式
Actus Reus Alone = Liability (No Mens Rea Needed)
With strict liability offences, it is enough that the defendant performed the prohibited act; no guilty mind needs to be proved. These are typically regulatory crimes, such as selling alcohol to an underage person or speeding, where Parliament has chosen to dispense with mens rea for at least one element.
在严格责任罪行中，只需证明被告实施了受禁行为，无需证明犯罪意图。这类罪行通常是监管性犯罪，如向未成年人出售酒精或超速驾驶，国会在制定法律时选择至少对某一要素免去犯罪意图要求。
The key defence is 'due diligence' — if the defendant can show they took all reasonable steps to avoid committing the offence, they may be acquitted. Common examples include 'no fault' or 'third party act' arguments.
关键辩护是“尽职调查”——如果被告能证明已采取所有合理措施避免犯罪，可能被判无罪。常见论点包括“无过错”或“第三方行为”。
3. Causation Principle | 因果关系定理
Factual Causation + Legal Causation = Chain of Causation
To link the defendant's act to the result, the prosecution must establish both factual causation (the 'but for' test: but for the defendant's conduct, would the result have occurred?) and legal causation (the act was the substantial and operating cause, with no intervening act breaking the chain).
要将被告的行为与结果联系起来，控方必须同时建立事实因果关系（“若无则不”测试：若非被告的行为，结果是否还会发生？）和法律因果关系（该行为是实质且有效的原因，且没有介入行为打断因果链条）。
An intervening act (novus actus interveniens) must be unforeseeable, voluntary, and sufficiently independent to break the chain. Medical negligence is rarely enough; the defendant must take the victim as they find them (thin skull rule).
介入行为（新介入行为）必须是不可预见的、自愿的且足够独立，才能打断因果链。医疗过失通常不足以中断；被告必须接受受害者原有的状况（蛋壳脑壳规则）。
4. Murder Definition | 谋杀定义公式
Unlawful Killing + Malice Aforethought = Murder
Murder is the common law offence of unlawfully killing a reasonable person in being under the Queen's peace, with malice aforethought. Malice aforethought means intention to kill or intention to cause really serious harm (grievous bodily harm).
谋杀是普通法上的罪行，指在王国内和平状态下非法杀害一个有生命的理性人，且具有恶意预谋。恶意预谋指意图杀人或意图造成非常严重的伤害（重伤）。
A defendant charged with murder may use a partial defence (diminished responsibility, loss of control, or suicide pact) to reduce the conviction to voluntary manslaughter, thus avoiding the mandatory life sentence.
被控谋杀的被告可使用部分辩护理由（减轻责任、失控或自杀协议）将定罪减轻为自愿误杀，从而避免强制终身监禁。
5. Diminished Responsibility Formula | 减轻责任公式
pairment + Recognised Medical Condition + Provides Explanation = Diminished Responsibility
Under the Coroners and Justice Act 2009, diminished responsibility requires: the defendant had an abnormality of mental functioning arising from a recognised medical condition; this substantially impaired their ability to understand their conduct, form a rational judgment, or exercise self-control; and it provides an explanation for the killing.
根据《2009年验尸官和司法法》，减轻责任要求：被告因公认的医疗状况出现精神功能异常；这严重损害了他们理解自身行为、作出理性判断或行使自控力的能力；并且这为杀人行为提供了解释。
The burden of proof is on the defendant, on the balance of probabilities. If successful, the verdict becomes voluntary manslaughter and the judge has discretion in sentencing.
举证责任在被告，采优势证据标准。若辩护成功，裁决变为自愿误杀，法官在量刑方面拥有裁量权。
6. Unlawful Act Manslaughter Formula | 非法行为误杀公式
Unlawful Act + Dangerousness + Causes Death = Unlawful Act Manslaughter
To secure a conviction for involuntary manslaughter by an unlawful act, the prosecution must prove the defendant committed an intentional, unlawful act; that the act was dangerous in the sense that a reasonable person would foresee some physical harm; and that the act caused death.
要判定非法行为误杀罪，控方必须证明被告实施了一项故意、非法的行为；该行为是危险的，即一个理性人能预见到某种身体伤害；并且该行为导致了死亡。
The unlawful act must be a crime in itself and must be the direct cause of death. The defendant does not need to foresee the risk of death, only the risk of some harm. Classic examples include a punch that leads to the victim hitting their head.
非法行为本身必须是犯罪，且必须是死亡的直接原因。被告无需预见到死亡风险，仅需预见到某种伤害风险。典型例子是一拳导致受害者撞到头部。
7. Non-Fatal Offence Progression | 非致命侵害升级公式
Assault + Battery → ABH → GBH (s.20) → GBH (s.18)
Non-fatal offences against the person form a hierarchy based on harm and mens rea. Assault (causing another to apprehend immediate unlawful force) and battery (applying unlawful force) are the base offences. Assault occasioning actual bodily harm (ABH) requires assault or battery that causes more than transient harm. Grievous bodily harm (GBH) under s.20 OAPA 1861 requires a wound or very serious harm, with intention or recklessness as to some harm. Under s.18, the defendant must intend GBH or resist arrest.
针对人身的非致命侵害依据损害程度和犯罪意图构成层级体系。威胁（使他人担心即时非法暴力）和殴打（施加非法暴力）为基础罪行。导致实际身体伤害（ABH）的威胁或殴打需造成超过短暂的伤害。根据《1861年侵害人身法》第20条，重伤（GBH）要求有创伤或非常严重的损害，主观上需有故意或轻率造成某种伤害。第18条则要求故意造成重伤或拒捕。
Using this ladder, you can map the mens rea and level of injury to the appropriate charge. The maximum sentences rise from six months for battery to life imprisonment for s.18 GBH.
利用此阶梯表，你可以将犯罪意图和伤害程度对应到适当的控罪。最高刑期从殴打的六个月提升至第18条重伤的终身监禁。
8. Theft Formula | 盗窃罪公式
Appropriation + Property + Belonging to Another + Intention to Permanently Deprive = Theft
Defined in s.1 of the Theft Act 1968, theft has five elements that must all be satisfied. 'Appropriation' covers assuming any of the rights of an owner. 'Property' includes money and all other property, real or personal, including things in action. The 'dishonesty' test now follows Ivey v Genting Casinos (2017): what was the defendant's actual state of knowledge and belief, and was their conduct dishonest by the standards of ordinary decent people?
盗窃罪由《1968年盗窃法》第1条规定，有五个必须全部满足的要素。“占用”包括行使所有者的任何权利。“财产”包括金钱及其他所有不动产和动产，包括无形财产。“不诚实”的检验现在遵循Ivey诉Genting Casinos案（2017）：被告的实际认知和信念状态如何，以及按照正直普通人的标准，其行为是否不诚实？
The intention to permanently deprive does not require a permanent taking; it is enough if the defendant treats the property as their own regardless of the owner's rights. Conditional return does not remove intent if the property is taken as mere 'pawn' in an already lost condition.
永久剥夺的意图不要求永久取得；若被告视他人财产为己物，不顾物主权利，即已足够。如果财产只是作为在已丧失状态下的“抵押品”而被占有，有条件的返还也不能消除该意图。
9. Negligence Formula (Tort) | 过失侵权公式
Duty of Care + Breach + Damage = Negligence
Claimants must prove three elements to succeed in a negligence claim. A duty of care arises if there is proximity between the parties and it is fair, just and reasonable to impose a duty (Caparo v Dickman three-part test). Breach is judged by the standard of the reasonable person, with factors like reasonable foreseeability, probability of harm, and the social utility of the conduct.
原告须证明三个要素才能在过失诉讼中胜诉。若双方存在近邻性，且施加义务公平、公正、合理，则产生注意义务（Caparo诉Dickman三阶段测试）。违反义务以理性人标准评判，考量合理可预见性、损害可能性以及行为的社会效益等因素。
Damage must be caused by the breach, both factually and legally, and must not be too remote. The type of damage must be reasonably foreseeable (Wagon Mound). Pure economic loss and psychiatric harm carry special rules limiting recovery.
损害必须由违反义务行为在事实上和法律上造成，且不能太遥远。损害类型须合理可预见（Wagon Mound案）。纯经济损失和精神损害则有特定规则限制赔偿。
10. Contract Formation Formula | 合同成立公式
ffer + Acceptance + Consideration + Intention to Create Legal Relations = Binding Contract
An offer is a definite promise to be bound on specified terms. It must be distinguished from an invitation to treat. Acceptance must be unconditional, communicated to the offeror (unless postal rule applies), and must mirror the offer. Consideration means something of value given by each party — it must be sufficient but need not be adequate.
要约是愿意接受特定条件约束的确定承诺，须与要约邀请区分。承诺必须无条件，传达给要约人（除非适用邮寄规则），且必须镜像要约。对价指各方给予的有价值之物——它必须充分但不必对等。
In social or domestic arrangements, there is a presumption of no intention to create legal relations, while in commercial contexts the presumption is the opposite. Both presumptions can be rebutted by evidence.
在社交或家庭安排中，推定无意建立法律关系，而在商业语境下推定相反。两种推定均可被证据推翻。
11. Contract Terms Theorem | 合同条款定理
Condition → Termination + Damages ; Warranty → Damages Only
Contract terms are classified by their importance. A condition is a term that goes to the root of the contract; if breached, the innocent party can both terminate the contract and claim damages. A warranty is a less essential term; its breach entitles the party to damages only. The test is the proportionality of the remedy: would the breach deprive the innocent party of substantially the whole benefit of the contract?
合同条款按其重要性分类。条件条款是涉及合同根基的条款；若被违反，无辜方既可终止合同又可索赔。保证条款则为次要条款，违反时仅能索赔。检验标准是救济是否成比例：该违反是否会实质上剥夺无辜方在合同中的全部利益？
Innominate (intermediate) terms allow the court to assess the seriousness of the breach before deciding the remedy. The Consumer Rights Act 2015 also implies terms into consumer contracts, such as satisfactory quality and fitness for purpose.
无名条款（中间条款）允许法院在决定救济前评估违反的严重性。《2015年消费者权益法》还在消费者合同中隐含了条款，如质量满意和符合用途。
12. Precedent 'Theorem' | 判例法“定理”
Like Cases Decided Alike = Stare Decisis
The doctrine of precedent (stare decisis) is the judicial 'formula' for consistency. A court is bound by decisions of a higher court in the hierarchy. The Supreme Court (formerly the House of Lords) binds all lower courts and is itself bound by its own past decisions only where it considers it right to do so (Practice Statement 1966). The Court of Appeal (Civil and Criminal Divisions) is generally bound by its own previous decisions, subject to Young v Bristol Aeroplane exceptions.
遵循先例原则（stare decisis）是确保一致性的司法“公式”。法院受更高层级法院判决的约束。最高法院（原上议院）约束所有下级法院，并且只有在认为适当时才受自身以往判决的约束（《1966年实践声明》）。上诉法院（民事和刑事分庭）通常受自身先前判决约束，但可适用Young诉Bristol Aeroplane案的例外。
The ratio decidendi of a case is the legal principle that must be followed; the rest is obiter dicta (persuasive but not binding). Distinguishing cases on their facts allows lower courts to avoid awkward precedents.
一个案件的判决理由是必须遵循的法律原则；其余为附带意见（具说服力但不具约束力）。通过事实区分，下级法院可以规避不便援用的先例。
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