📚 Year 12 Cambridge Philosophy: Case Study Practical Exercise | 剑桥12年级哲学：案例分析实战演练
Mastering the case study question in Cambridge AS Philosophy (9696) requires more than just knowing theories—you must be able to apply them to unfamiliar, morally complex scenarios and evaluate their strengths and weaknesses in context. This practical exercise walks you through a classic thought experiment, showing you how to construct high-scoring answers using utilitarianism, Kantian deontology, virtue ethics, rights-based thinking and the doctrine of double effect. By the end, you will have a clear template for tackling any ethical case study that appears in your exam.
攻克剑桥AS哲学（9696）中的案例分析题，仅靠记忆理论远远不够——你必须能够将理论应用于陌生的、具有道德复杂性的情景，并在具体语境中评价其优劣。本实战演练将带你剖析一个经典的思想实验，展示如何运用功利主义、康德义务论、美德伦理学、权利本位思维以及双重效应原则来构建高分答案。演练结束后，你将获得一个清晰的模板，用以应对考试中出现的任何伦理案例分析题。
1. Presenting the Case: The Transplant Surgeon Dilemma | 案例呈现：移植外科医生困境
A renowned transplant surgeon faces an agonising situation. Five patients in her hospital are dying from different organ failures: one needs a heart, two require kidneys, one needs a liver, and one needs a lung. Without immediate transplants, all five will certainly die within hours. Coincidentally, a healthy young man arrives for a routine check-up. He is an excellent tissue match for all five patients and, being unconscious from sedation, could be operated on without resistance. The surgeon realises that she could secretly harvest his organs, kill him, and save the five lives. No one would ever discover the act. Should she proceed?
一位著名的移植外科医生面临一个痛苦的局面。她所在的医院有五名患者因不同器官衰竭而濒临死亡：一人需要心脏，两人需要肾脏，一人需要肝脏，一人需要肺。如果不立即进行移植，这五个人在几小时内都将确定死亡。巧合的是，一位健康青年来院进行常规体检，他与五名患者组织配型极佳，并且因镇静剂作用处于无意识状态，可以在毫无抵抗的情况下接受手术。医生意识到自己可以秘密摘取他的器官，杀死他，从而拯救五条生命，而且永远不会被发现。她应该这么做吗？
2. Utilitarian Analysis: Maximising Welfare | 功利主义分析：最大化福祉
From a classical utilitarian standpoint, the right action is the one that produces the greatest happiness for the greatest number. Jeremy Bentham’s hedonic calculus encourages us to weigh the pleasures and pains generated by each possible act. In this case, allowing the five to die results in five deaths and enormous grief for families. Killing the healthy man causes one death but saves five, leading to a net saving of four lives and a clear surplus of happiness over suffering. A quantitative utilitarian would conclude that the surgeon is morally obliged to sacrifice the one.
从古典功利主义立场看，正确的行动是能为最大多数人带来最大幸福的行为。杰里米·边沁的快乐计算法鼓励我们衡量每个可能行为所产生的快乐与痛苦。在本案例中，任由五人死亡将导致五人丧生，并给众多家庭带来巨大悲痛。杀死健康者引发一人死亡，却救下五人，净挽救四条生命，幸福总量明显超过痛苦。一个注重计量的功利主义者会得出结论：医生有道德义务牺牲这一人。
Mill’s qualitative utilitarianism adds nuance, distinguishing higher and lower pleasures. Yet even under Mill’s refinement, the preservation of five rational, self-conscious lives outweighs the single life lost; the qualitative gain in human flourishing is immense. Utilitarians would highlight the impartial perspective: each life counts equally, and five count for more than one.
密尔的质化功利主义增加了细微差别，区分高级快乐与低级快乐。但即便按照密尔的改良理论，保全五个理性、自我意识的生命也远超失去一个生命的损失，人类繁荣在质上的增进极其巨大。功利主义者会强调不偏不倚的视角：每条生命平等计算，五条生命多于一条。
However, a critic could challenge the surgeon’s ability to predict consequences accurately. What if the transplanted organs are rejected? What if the man was on the verge of a cure for a global disease? Act utilitarianism requires omniscience that humans lack, making the calculus practically uncertain.
然而，批评者会质疑医生准确预测后果的能力。如果移植的器官被排斥怎么办？如果这位年轻人即将发现一种全球性疾病的疗法呢？行为功利主义要求人类具备全知视角，而这在实际中是不确定的。
3. Deontological Critique: Kant’s Categorical Imperative | 义务论批判：康德的定言命令
Immanuel Kant’s deontology rejects the idea that consequences alone determine moral worth. For Kant, an act is morally permissible only if it can be universalised without contradiction and if it treats humanity—including oneself and others—never merely as a means but always also as an end. The transplant surgeon’s proposed action clearly fails both tests.
伊曼努尔·康德的义务论拒绝仅以后果决定道德价值的观点。在康德看来，一个行为只有在能够不自相矛盾地普遍化、并且始终把人（包括自己和他人）不只当作手段而同时也当作目的时，才具有道德正当性。移植外科医生提议的行动显然通不过这两个检验。
First, universalisation: ‘Whenever organ shortages occur, one may kill an innocent person to harvest organs.’ If universalised, this maxim would create a world of terror where no one could feel safe in a hospital; the very institution of medicine, predicated on trust, would collapse. The maxim generates a contradiction in conception—it undermines the practice it relies on. Second, the surgeon uses the healthy man purely as a resource to benefit others, stripping him of his rational agency and autonomy. The man is treated as a mere tool, not as a being with intrinsic worth.
首先，普遍化检验：“每当出现器官短缺，就可以杀死一个无辜者来摘取器官”。如果把这条准则普遍化，将制造出一个充满恐惧的世界，没有人会在医院里感到安全；建立在信任基础上的医学建制将崩溃。这条准则在概念上自相矛盾——它摧毁了自身所依赖的实践。其次，医生把健康者纯粹当作有益于他人的工具，剥夺了他的理性主体性和自主性。这人被仅仅当成一件工具，而不是具有内在价值的生命。
Kant’s second formulation would thus categorically prohibit the killing. Even though five lives are at stake, the surgeon’s duty is to refrain from violating the moral law. A Kantian would instead search for alternative just means, such as waiting for voluntary donors or improving organ allocation.
康德的第二公式因此会绝对禁止这一杀戮。即便五条生命危在旦夕，医生的义务仍是避免违反道德法则。一个康德主义者反而会寻找其他正当手段，例如等待自愿捐献者或改善器官分配制度。
4. Virtue Ethics Perspective: Character and Flourishing | 美德伦理学视角：品格与繁荣
Aristotle’s virtue ethics turns the question from ‘What should I do?’ to ‘What kind of person should I be?’ The virtuous agent acts in accordance with practical wisdom (phronēsis) to realise eudaimonia—a flourishing life. A doctor who secretly kills a patient, even for seemingly beneficial ends, corrupts her own character. She would cultivate vices of callousness, deceit and arrogance, undermining the virtues of compassion, honesty and trustworthiness that define an excellent physician.
亚里士多德的美德伦理学将问题从“我该做什么”转向“我应成为什么样的人”。有德性的行动者依据实践智慧（phronēsis）行事，实现人的繁荣（eudaimonia）。一名医生若秘密杀死病人，即使是为了看似有益的目的，也会腐蚀自己的品格。她会养成冷酷、欺骗和傲慢的恶习，损害同情、诚实和可信赖等界定优秀医生的美德。
Furthermore, a virtuous community relies on medical practitioners who honour the sanctity of life. If the profession tolerated secret sacrifice, the community’s trust—and with it the conditions for moral growth—would erode. From the virtue perspective, the surgeon should resist the temptation and instead act with integrity, seeking transparent, courageous solutions that preserve both her character and the common good.
此外，一个具有美德的社群有赖于尊重生命神圣性的医疗从业者。如果这一职业容忍秘密牺牲，社群的信任及其道德成长的土壤都将遭到侵蚀。从美德角度看，医生应抵制诱惑，以正直行事，寻求坦荡、勇敢的解决方案，从而同时保全自己的品格与共同利益。
5. Rights-Based Approach: The Inviolability of Life | 基于权利的进路：生命的不可侵犯性
Rights theories, such as those developed by John Locke and later by Robert Nozick, hold that individuals possess fundamental rights that must not be violated, even for the greater good. The most basic right is the right to life. The healthy man has a moral and legal right not to be killed, and this right acts as a side-constraint on the surgeon’s action. Nozick would argue that the man is a separate being, not a resource to be reallocated. His inviolability means the surgeon may not sacrifice him even to avert a greater disaster.
权利理论——如洛克和后来诺齐克发展出的那些——主张个体拥有不得被侵犯的基本权利，即便出于更宏大之善。最基本的权利是生命权。那位健康者拥有不被杀死的道德和法律权利，这种权利构成了对医生行为的边界约束。诺齐克会论证，该男子是一个独立的个体，不是可被重新分配的资源。他的不可侵犯性意味着医生即使为了避免更大的灾难，也不能牺牲他。
Critics of a rigid rights approach point out that competing rights are at play: the five dying patients also have a right to life, and perhaps even a right to the surgeon’s assistance. The challenge becomes how to adjudicate between conflicting positive and negative rights. Yet most rights theorists maintain that the negative right against being killed carries stronger normative force than the positive right to be saved.
对刻板权利进路的批评者指出，这里存在相互竞争的权利：五名濒死病人同样拥有生命权，或许还有获得医生救助的权利。难题在于如何裁决相互冲突的积极权利与消极权利。不过，多数权利理论家坚持，不被杀害的消极权利在规范性上比被拯救的积极权利更有分量。
6. Doctrine of Double Effect: Intention vs. Side Effect | 双重效应原则：意图与副作用
The doctrine of double effect (DDE), often traced to Aquinas, distinguishes between intended outcomes and merely foreseen side effects. An act that causes harm can be morally permissible if the harm is not intended, is proportional to the good achieved, and the good effect is not caused via the bad effect. Some students might think DDE permits the surgeon to harvest organs because she ‘only’ intends to save the five and merely foresees the one death. However, this misapplies the doctrine.
双重效应原则（常追溯至阿奎那）区分了意图达成的结果与仅被预见的副作用。如果一个行为引发的伤害并非出于意图、伤害与所实现之善成比例、且善果并非经由恶果所导致，则该行为可能在道德上被允许。有些学生可能认为，双重效应原则容许医生摘取器官，因为她“仅仅”意图拯救五人，只是预见了一人死亡。然而，这误用了该原则。
For DDE to permit an act, the good effect must be causally independent of the bad effect. Here, saving the five is directly and causally brought about by the killing; the death is the very means to the end. Classic examples of DDE—such as palliative care that may hasten death—differ because the death is not the mechanism of relief. Therefore, the transplant scenario fails the DDE test. The surgeon would be intentionally using killing as a means, which remains morally impermissible.
要使一个行为被双重效应原则所允许，善果必须在因果上独立于恶果。但在本案例中，救活五人是直接通过杀人这一行为因果性地实现的；死亡本身就是达成目的的手段。经典的DDE例子——如可能加速死亡的姑息治疗——与此不同，因为死亡并非解除痛苦的机制。因此，移植情景通不过双重效应的检验。医生将会故意用杀人作为手段，这在道德上仍是不被允许的。
7. Comparing Theories: Strengths and Weaknesses | 理论对比：优势与不足
When writing case-study answers, it is crucial to weigh the theories against each other rather than simply listing them. A simple comparison table can help organise your thoughts before you draft your essay.
在撰写案例分析答案时，关键在于对诸理论进行权衡比较，而非简单罗列。在打草稿前，用一个简明的对比表格有助于理清思路。
| Theory | Verdict on the Case | Key Strength | Key Weakness |
|---|---|---|---|
| Utilitarianism | Sacrifice is required. | Impartial, produces best outcome. | Allows injustice; demands impossible predictions. |
| Kantian Deontology | Sacrifice is forbidden. | Respects human dignity. | Rigid; may lead to inaction when lives could be saved. |
| Virtue Ethics | The doctor should not kill. | Focuses on character and flourishing. | Does not give clear action-guidance in acute dilemmas. |
| Rights-based | The right not to be killed prevails. | Protects individuals from being used. | May fail to resolve conflicts of rights. |
| Double Effect | Not permissible; death is means. | Captures moral relevance of intention. | Difficult to distinguish intended from foreseen in practice. |
This overview reveals a pronounced tension between consequentialist and deontological frameworks. In your own writing, you should identify this tension explicitly and then develop an argument that justifies which side—or which combination—offers the most defensible position. You might, for instance, argue that Kant’s emphasis on dignity is more convincing because utilitarianism can justify horrific acts when taken to logical extremes.
这一概览揭示了结果论和义务论框架之间的显著张力。在写作时，你应明确指出这一张力，然后展开论证，阐明哪一方——或哪一种结合——提供了最可辩护的立场。例如，你可以论证康德对尊严的强调更具说服力，因为功利主义在逻辑极端下可能为恐怖行为正名。
8. Developing a Balanced Evaluative Argument | 构建平衡的评价性论证
Top-mark philosophy answers do not merely state opposing views; they synthesise and evaluate them. Begin by acknowledging the appeal of the utilitarian solution: it appears rational, benevolent and mathematically straightforward. Then immediately challenge it with a deontological counter-argument, perhaps citing Kant’s claim that a person has unconditional worth, a ‘dignity’ beyond any price. Use the phrase ‘Behandele die Menschheit … jederzeit zugleich als Zweck, niemals bloss als Mittel’ (act always that you treat humanity … always at the same time as an end, never merely as a means) to ground your objection.
获得高分的哲学答案不只是陈述对立观点，而是综合并评价它们。首先，承认功利主义解决方案的吸引力：它显得理性、仁慈且计算直截。然后，立刻用义务论的反驳去挑战它，可引用康德的主张：人具有无条件的价值，一种超越任何价格的“尊严”。使用“始终将人当作目的，而非仅仅当作手段”这一表述来支撑你的反驳。
Next, test the limits of the deontological stance. Would the Kantian really let five die for the sake of a formal principle? Here you can introduce a possible modification: threshold deontology, which permits breaking a rule only when the consequences cross a catastrophic threshold. While some philosophers like Philippa Foot have explored this, it still struggles to specify a non-arbitrary threshold. Then, bring virtue ethics and rights-based thinking into dialogue with these positions to show breadth of understanding. Conclude that while no single theory is flawless, a pluralist position that respects inviolable rights while maximising welfare within strict moral constraints may offer the most satisfactory outcome—yet even this must be scrutinised for coherence.
接着，检验义务论立场的局限。康德主义者真的会为了一个形式原则而任由五人死亡吗？在此你可以引入一种可能的修正：门槛义务论，即只有当后果越过灾难性门槛时，才允许打破规则。虽然像菲利帕·福特这样的哲学家曾进行探索，但该理论仍难以确定一个非任意的门槛。然后，将美德伦理和权利本位思维与这些立场展开对话，以展示理解的广度。结论可以是：虽然没有一个单一理论完美无缺，但一种多元主义立场——既尊重不可侵犯的权利，又在严格的道德约束内尽可能增进福祉——或许能提供最令人满意的方案；然而，即便是这一点也需接受连贯性审查。
9. Common Mistakes in Case-Study Answers | 案例分析答案中的常见错误
Many Cambridge AS candidates lose marks not because they lack knowledge, but because of structural and argumentative weaknesses. The most frequent errors include: (1) narrating the case rather than philosophically analysing it; (2) providing a ‘shopping list’ of theories without linking them to each other; (3) failing to evaluate—merely describing what a utilitarian or Kantian would say is not enough; you must judge which reasoning is stronger and why; (4) ignoring the specific details of the case, such as the fact that the man is sedated and unaware, which changes discussions of consent and autonomy; and (5) making unsupported assertions like ‘Kant is wrong’ without counter-argumentation.
许多剑桥AS考生失分并非因为缺乏知识，而是因为结构和论证上的薄弱。最常见的错误包括：（1）复述案例而非从哲学角度分析；（2）提供一份理论的“购物清单”，却不将理论彼此关联；（3）缺乏评价——仅仅描述功利主义者或康德主义者会怎么说是不够的，你必须评判哪种推理更强、为什么；（4）忽视案例的具体细节，如该男子因镇静而无意识这一事实，这会改变关于同意与自主性的讨论；（5）作出“康德错了”之类无根据的论断，却没有加以反驳论证。
To avoid these, always structure your answer around a critical question, such as ‘Is it ever permissible to intentionally kill an innocent person to save more lives?’ This question serves as a unifying thread, forcing you to weigh theories instead of merely recounting them.
为避免这些错误，始终围绕一个批判性问题来组织你的答案，例如：“故意杀死一个无辜者以拯救更多生命，这在道德上能被允许吗？”这个问题充当一条主线，迫使你去权衡理论，而不仅仅是复述理论。
10. Final Practice Tips and Exam Strategy | 最终练习技巧与考试策略
Consistent practice with unfamiliar scenarios is the best preparation. Take short ethical vignettes—for instance, lying to protect someone’s feelings, breaking a promise to save a life, or diverting a runaway trolley—and apply all five frameworks in note form. Time yourself: in the exam, you will have roughly 30 minutes for a case-study question. Aim to spend 5 minutes planning, 20 minutes writing, and 5 minutes reviewing. Your plan should outline the verdict of each theory, a core tension, and your overall evaluative stance.
持续练习不熟悉的情境是最好的准备。选取简短的伦理小片段——例如为保护他人感受而说谎、为救人而违背承诺，或让失控电车改道——以要点形式套用全部五种框架。给自己计时：考试中，一道案例分析题大约有30分钟作答。目标是花5分钟规划，20分钟书写，5分钟检查。你的提纲应概括每个理论的判定、一个核心张力以及你的总体评价立场。
When evaluating, do not feel forced to choose a single ‘correct’ theory. Cambridge examiners reward perceptive comparisons that recognise the strengths of opposing views while defending a well-justified conclusion. Use signposting phrases such as ‘A utilitarian would respond that …’, ‘However, this fails to account for …’, and ‘A more promising synthesis might be …’ to guide the reader through your reasoning. Finally, read examiner reports for Philosophy (9696) to internalise what top-tier answers look like in practice.
在进行评价时，不必勉强选择一个“正确”的理论。剑桥考官欣赏那些敏锐的比较，既能认可对立观点的长处，又能捍卫一个论证充分的结论。使用路标性短语，如“功利主义者会回应说……”、“然而，这未能解释……”、“一个更有前景的综合可能是……”，引导读者跟随你的推理。最后，阅读哲学（9696）的考官报告，将高分答案的实际样貌内化于心。
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