📚 IGCSE CCEA Law: Formula and Principles Quick Reference | IGCSE CCEA 法律：公式定理速查手册
This quick reference handbook condenses key CCEA GCSE Law principles into clear formulas. Each formula shows how legal rules are built from elements that examiners expect you to identify and apply. Use it alongside past papers to turn case facts into structured legal arguments.
本速查手册将 CCEA GCSE 法律核心原则浓缩为清晰公式。每个公式展示法律规则如何由考试要求你识别和适用的要素构成。结合历年真题使用，可帮助你将案例事实转化为结构化的法律论证。
1. The Basic Legal Rule Formula | 法律规则基本公式
Legal rule = General principle + Sanction
法律规则 = 一般原则 + 制裁
A legal rule can be stated as a general principle plus a sanction for its breach. If there is no enforceable consequence, the rule is merely social or moral rather than legal.
法律规则可表述为一般原则加上违反该原则的制裁。如果没有可强制执行的后果，该规则只是社会或道德规则，而不是法律规则。
For example, the rule that a driver must stop at a red traffic light contains a principle (stop when the light is red) and a sanction (a fine or penalty points). Without a penalty, obedience depends only on conscience.
例如，司机遇红灯必须停车这一规则包含原则（红灯时停车）和制裁（罚款或记分）。没有处罚，遵守就只能依靠自觉。
2. Criminal Liability Formula | 刑事责任公式
Criminal liability = Actus Reus + Mens Rea
刑事责任 = 犯罪行为 + 犯罪意图
Actus reus is the physical element of a crime: a voluntary act, an omission where there is a legal duty, or a prohibited state of affairs. Mens rea is the mental element: direct intent, oblique intent or recklessness.
犯罪行为是犯罪的客观要素：自愿行为、有法律义务时的不作为或禁止状态。犯罪意图是主观要素：直接故意、间接故意或轻率。
For most offences, the prosecution must prove both elements beyond reasonable doubt. This formula is the default rule in criminal law unless Parliament creates a strict liability offence.
对大多数犯罪，控方必须排除合理怀疑地证明两个要素。这是刑法的默认规则，除非议会设立严格责任犯罪。
3. Negligence Formula | 过失侵权公式
Negligence = Duty of care + Breach of duty + Causation + Damage
过失侵权 = 注意义务 + 违反义务 + 因果关系 + 损害
A duty of care exists when the defendant can reasonably foresee that careless conduct may harm the claimant. The Caparo test adds proximity and fairness, justice and reasonableness.
当被告能合理预见其疏忽行为可能伤害索赔人时，即存在注意义务。Caparo 标准还要求邻近性以及公平、公正和合理。
Breach is judged by the standard of the reasonable person. The claimant must prove that the breach caused the damage, both in fact and in law, and that the damage is not too remote.
是否违反义务以理性人标准判断。索赔人必须证明违反义务在事实上和法律上造成了损害，且损害并非过于遥远。
4. Contract Formation Formula | 合同成立公式
Valid contract = Offer + Acceptance + Consideration + Intention to create legal relations
有效合同 = 要约 + 承诺 + 对价 + 设立法律关系的意图
An offer is a definite promise to be bound on stated terms, while an invitation to treat is only an invitation to make offers. Acceptance must be unconditional and communicated to the offeror.
要约是在明示条款下受约束的确定承诺，而要约邀请只是邀请他人提出要约。承诺必须无条件并传达给要约人。
Consideration is something of value exchanged between the parties. In social or family agreements, there is a presumption against legal intention; in commercial agreements, the presumption is that intention exists.
对价是当事人之间交换的有价值之物。在社交或家庭协议中，推定不具备法律意图；在商业协议中，则推定存在法律意图。
5. Strict Liability and Absolute Liability | 严格责任与绝对责任
Strict liability = Actus Reus only (no mens rea required)
严格责任 = 仅需犯罪行为（不要求犯罪意图）
In strict liability offences, the prosecution does not need to prove mens rea for at least one element of the actus reus. Defendants may use the defence of due diligence if the statute allows it.
在严格责任犯罪中，控方无需证明至少一项犯罪行为的犯罪意图。如果法规允许，被告可以援引尽职辩护。
Absolute liability goes further: there is no mens rea requirement and no due diligence defence. These offences are rare and usually involve public safety or regulatory breaches.
绝对责任更进一步：既不要求犯罪意图，也无尽职辩护。此类犯罪较少见，通常涉及公共安全或监管违规。
6. Homicide Classification Formulas | 杀人罪分类公式
Murder = Unlawful killing + Malice aforethought
谋杀 = 非法杀人 + 恶意预谋
Malice aforethought means intention to kill or intention to cause really serious harm. If this mens rea is absent, the killing may be manslaughter instead.
恶意预谋指意图杀人或意图造成真正严重伤害。如果缺少这一犯罪意图，罪行可能降为过失杀人。
Voluntary manslaughter arises when murder is reduced by a special defence such as diminished responsibility or loss of control. Involuntary manslaughter includes unlawful act manslaughter and gross negligence manslaughter.
自愿过失杀人指因减轻责任或失去控制等特殊辩护而从谋杀降级的杀人。非自愿过失杀人包括非法行为过失杀人和重大过失过失杀人。
7. Statutory Interpretation Rules | 法律解释规则
Literal rule → text; Golden rule → avoid absurdity; Mischief rule → remedy the gap
文义规则→文本；黄金规则→避免荒谬；除弊规则→弥补漏洞
The literal rule gives words their ordinary dictionary meaning, even if the result seems harsh. The golden rule allows a court to depart from the literal meaning only to avoid an absurd outcome.
文义规则按词典的普通含义解释词语，即使结果显得苛刻。黄金规则仅在避免荒谬结果时允许法院偏离文义。
The mischief rule looks at the problem Parliament intended to fix and interprets the statute to suppress the mischief. The purposive approach goes further by asking what Parliament broadly aimed to achieve.
除弊规则审视议会意图解决的问题，并解释法规以消除弊端。目的解释法则进一步追问议会总体旨在实现什么。
8. Judicial Precedent Formula | 司法先例公式
Binding precedent = Ratio decidendi from a higher court
有约束力的先例 = 上级法院的判决理由
The ratio decidendi is the legal reason necessary for the decision. It is the part of the judgment that binds later courts under the doctrine of stare decisis. Obiter dicta are remarks made in passing and are merely persuasive.
判决理由是作出判决所必需的法律理由。根据遵循先例原则，这部分对后来的法院有约束力。附带意见是判决中的附带评论，仅具说服力。
A court must follow binding precedents from courts above it in the hierarchy. It may distinguish a precedent if the material facts are different, or overrule it if the higher court itself decides to change the law.
法院必须遵循等级体系中上级法院的有约束力先例。如果关键事实不同，可以区分先例；如果上级法院自行决定改变法律，可以推翻先例。
9. Criminal Defences Formula | 刑事辩护公式
Defence = Denial of an element OR Excuse OR Justification
辩护 = 否认要素 或 免责 或 正当理由
A denial defence shows that actus reus or mens rea is not proved. An excuse, such as duress or automatism, accepts the act but argues the defendant should not be blamed. A justification, such as self-defence, argues the act was lawful.
否认辩护表明犯罪行为或犯罪意图未被证明。免责辩护（如胁迫或自动症）承认行为但主张被告不应受责。正当理由辩护（如自卫）主张行为是合法的。
Self-defence requires reasonable force used for protection. The defendant must honestly believe force is necessary and the amount of force must be proportionate to the threat.
自卫要求为保护而使用合理武力。被告必须真诚相信使用武力是必要的，且武力程度必须与威胁相称。
10. Remedies Formula | 救济公式
Compensation = Restitutio in integrum (restore to original position)
赔偿 = 恢复原状
In tort and contract, the aim of damages is to put the claimant in the position they would have been in had the wrong not occurred. Special damages cover quantifiable losses; general damages cover non-monetary losses such as pain and suffering.
在侵权和合同中，损害赔偿的目的是将索赔人置于加害行为未发生时的地位。特别损害赔偿涵盖可量化的损失；一般损害赔偿涵盖疼痛和痛苦等非金钱损失。
Equitable remedies include injunctions, which order a party to do or stop doing something, and specific performance, which orders a party to perform a contract. These are discretionary and granted only when damages are inadequate.
衡平法救济包括禁令（命令一方做或停止做某事）和实际履行（命令一方履行合同）。这些救济由法院酌情决定，仅在损害赔偿不足时授予。
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