📚 IGCSE Cambridge Philosophy: Core Knowledge Points | IGCSE 剑桥哲学：核心知识点梳理
This guide summarises the core knowledge points for the IGCSE Cambridge Philosophy course. It covers key branches, central debates, major theories, and exam technique in a bilingual format that helps you revise efficiently.
本指南总结了 IGCSE 剑桥哲学课程的核心知识点。它以中英双语形式涵盖主要分支、核心争论、主要理论和答题技巧，帮助你高效复习。
1. What is Philosophy? | 哲学是什么？
Philosophy is the systematic study of fundamental questions about existence, knowledge, value, reason, mind, and language. Unlike science, it does not rely primarily on experiment; it uses rational argument and conceptual analysis.
哲学是对存在、知识、价值、理性、心灵和语言等根本问题的系统研究。与科学不同，它主要不依赖实验，而是运用理性论证和概念分析。
A philosophical question is open-ended and cannot be settled by empirical observation alone. For example, ‘What makes an action right?’ requires reasoned debate rather than a laboratory test.
哲学问题是开放性的，不能仅靠经验观察来解决。例如，’什么使一个行为成为正确的？’需要理性辩论，而不是实验室检验。
Key branches include epistemology, metaphysics, ethics, political philosophy, and logic. Each branch uses different methods but shares the goal of clarifying concepts and testing beliefs.
主要分支包括认识论、形而上学、伦理学、政治哲学和逻辑学。每个分支使用不同的方法，但都有澄清概念和检验信念的共同目标。
2. Epistemology: Sources of Knowledge | 认识论：知识的来源
Epistemology asks what knowledge is, where it comes from, and how we can justify beliefs. The traditional definition of knowledge is justified true belief, although Gettier cases challenge this by showing that justified true belief can still fail to be knowledge.
认识论探讨知识是什么、知识来自哪里，以及我们如何为信念提供辩护。知识的传统定义是得到辩护的真信念，但盖梯尔问题表明，经过辩护的真信念仍然可能不是知识。
Key sources of knowledge include perception, reason, memory, testimony, and introspection. Each source has strengths and limitations, and sceptics doubt whether any source gives us certainty.
知识的主要来源包括感知、理性、记忆、证词和内省。每种来源都有优点和局限，怀疑论者质疑是否有任何来源能给我们确定性。
In IGCSE answers, you should be able to explain how a philosopher might defend one source over another, and evaluate whether that source is reliable enough to justify belief.
在 IGCSE 答案中，你应该能够解释哲学家如何为某一来源辩护并评估该来源是否足够可靠，以证明信念的合理性。
3. Rationalism vs Empiricism | 理性主义与经验主义
Rationalists argue that reason is the primary source of knowledge and that some ideas are innate. Descartes famously claimed that ‘I think, therefore I am’ is known by reason alone, without sense experience.
理性主义者认为理性是知识的主要来源，某些观念是天赋的。笛卡尔有句名言：’我思故我在’，它仅靠理性就能知道，不需要感官经验。
Empiricists hold that all knowledge begins with sense experience and the mind starts as a blank slate. Locke argued that there are no innate ideas; everything we know comes from experience, which he divided into sensation and reflection.
经验主义者认为所有知识始于感官经验，心灵最初是一块白板。洛克认为没有天赋观念；我们所知道的一切都来自经验，他把经验分为感觉和反省。
Key rationalists include Descartes, Spinoza, and Leibniz; key empiricists include Locke, Berkeley, and Hume. The debate also centres on a priori knowledge, which is independent of experience, and a posteriori knowledge, which depends on experience.
主要理性主义者包括笛卡尔、斯宾诺莎和莱布尼茨；主要经验主义者包括洛克、贝克莱和休谟。这场争论还围绕先验知识（独立于经验）和后验知识（依赖于经验）展开。
4. Metaphysics: Mind and Body | 形而上学：心灵与身体
Metaphysics examines the nature of reality, including the relationship between mind and body. The mind-body problem asks how mental states, such as thoughts and feelings, relate to physical states of the brain.
形而上学研究实在的本质，包括心灵与身体的关系。身心问题追问心理状态（如思想和感受）如何与大脑的物理状态相关。
Dualism claims that mind and body are distinct substances, as defended by Descartes. He argued that the body is extended in space while the mind is a thinking substance that is not extended.
二元论主张心灵与身体是不同的实体，由笛卡尔辩护。他认为身体在空间中具有广延，而心灵是不具有广延的思维实体。
Physicalism argues that mental states are physical states of the brain; no separate soul is needed. Key issues include consciousness, qualia, and the hard problem of subjective experience, which physicalism struggles to explain.
物理主义认为心理状态就是大脑的物理状态，不需要独立的灵魂。关键问题包括意识、感受质以及主观体验的困难问题，这是物理主义难以解释的。
5. Free Will and Determinism | 自由意志与决定论
Free will is the ability to choose and act otherwise; determinism says every event is caused by prior conditions. If determinism is true, then our choices seem to be fixed by past events and natural laws.
自由意志是做出不同选择和行为的能力；决定论认为每个事件都由先前条件决定。如果决定论为真，那么我们的选择似乎被过去事件和自然法则所固定。
Hard determinism denies free will, while compatibilism redefines freedom as acting without external coercion. Compatibilists argue that free will and determinism can both be true because a free act is one caused by our own desires, not by outside force.
强硬决定论否认自由意志，而相容论将自由重新定义为不受外部强迫的行动。相容论者认为自由意志和决定论可以同时为真，因为自由行为是由我们自己的欲望引起的，而不是由外力引起的。
Libertarianism in philosophy holds that free will is incompatible with determinism and that we do have free will. The debate matters for moral responsibility, praise, blame, and punishment, because we normally hold people responsible only for free actions.
哲学中的自由意志主义认为自由意志与决定论不相容，并且我们确实拥有自由意志。这场争论关系到道德责任、赞扬、指责和惩罚，因为通常我们只对自由行为追究责任。
6. Ethics: Normative Theories | 伦理学：规范理论
Normative ethics asks how we ought to act and what makes actions right or wrong. It provides general principles that can guide moral decisions in everyday life.
规范伦理学追问我们应当如何行动，以及什么使行为成为对或错。它提供能够指导日常生活中道德决定的一般原则。
Three major approaches are consequentialism, deontology, and virtue ethics. Consequentialism judges actions by outcomes; deontology judges actions by duties and rules; virtue ethics focuses on character and what a virtuous person would do.
三大主要路径是后果主义、义务论和德性伦理学。后果主义根据结果评判行为；义务论根据义务和规则评判行为；德性伦理学关注品格以及有德之人会怎么做。
Applied ethics uses these theories to discuss issues such as lying, stealing, euthanasia, and animal rights. A strong IGCSE answer will apply more than one theory and compare their recommendations before reaching a conclusion.
应用伦理学使用这些理论讨论说谎、偷窃、安乐死和动物权利等问题。优秀的 IGCSE 答案会应用不止一种理论，比较它们的建议，然后得出结论。
7. Utilitarianism and Kantian Ethics | 功利主义与康德伦理学
Utilitarianism is a consequentialist theory developed by Bentham and Mill: the right action maximises overall happiness. Bentham proposed a hedonic calculus that weighs pleasure and pain; Mill distinguished higher and lower pleasures.
功利主义是边沁和密尔发展的后果主义理论：正确的行为能最大化总体幸福。边沁提出了衡量快乐与痛苦的幸福计算法；密尔区分了高级快乐和低级快乐。
Act utilitarianism assesses each act; rule utilitarianism follows rules that generally promote happiness. A rule utilitarian might oppose lying because a general rule against lying produces more trust and therefore more happiness overall.
行为功利主义评估每个行为；规则功利主义遵循通常促进幸福的规则。规则功利主义者可能反对说谎，因为禁止说谎的普遍规则能产生更多信任，从而带来更多总体幸福。
Kantian deontology claims that we must act only on maxims that can be universalised and treat persons as ends, never merely as means. This means we cannot use a person solely as a tool for a goal, even if the goal is good.
康德义务论主张我们只应按能够普遍化的准则行动，并把人身永远当作目的，而绝不仅仅当作手段。这意味着我们不能仅仅把一个人当作实现目标的工具，即使目标是好的。
8. Political Philosophy: Justice and Authority | 政治哲学：正义与权威
Political philosophy examines the justification of government, the nature of justice, and the rights of citizens. A central question is why we should obey the state and what makes political power legitimate.
政治哲学考察政府的正当性、正义的本质以及公民的权利。一个核心问题是：我们为什么应该服从国家，以及什么使政治权力具有合法性。
Social contract theory says legitimate authority arises from the consent of the governed; Hobbes, Locke, and Rousseau offer different contracts. Hobbes wanted a strong ruler to avoid a brutal state of nature; Locke stressed natural rights and limited government.
社会契约论认为合法权威来自被统治者的同意；霍布斯、洛克和卢梭提出了不同的契约。霍布斯希望有强大的统治者以避免残酷的自然状态；洛克强调自然权利和有限政府。
John Rawls argues for justice as fairness: inequalities are justified only if they benefit the least advantaged. Debates also include the balance between liberty and equality, and the limits of state power over individuals.
约翰·罗尔斯主张作为公平的正义：不平等只有在有利于最不利者时才是正当的。争论还包括自由与平等的平衡，以及国家权力对个人限制的界限。
9. Philosophy of Religion: Arguments for God | 宗教哲学：上帝存在的论证
Philosophy of religion evaluates arguments for and against the existence of God using reason. It is not the same as theology, because it does not assume a particular religious faith.
宗教哲学运用理性评估支持和反对上帝存在的论证。它与神学不同，因为它不预设某一特定的宗教信仰。
The design argument claims that order in nature points to a designer; Hume and Darwin offer criticisms. Hume argued that the analogy between a watch and the universe is weak, and Darwin showed natural selection can explain apparent design without a designer.
设计论证主张自然界的秩序指向一个设计者；休谟和达尔文提出了批评。休谟认为手表与宇宙之间的类比很薄弱，达尔文则表明自然选择可以在没有设计者的情况下解释表面上的设计。
The cosmological argument says every contingent being needs a cause, leading to a first cause or necessary being. The problem of evil asks why an all-powerful, all-good God allows suffering; theodicies include free will and soul-making, which argue that evil is necessary for moral growth or free choice.
宇宙论论证认为每个偶然存在物都需要原因，最终推出第一因或必然存在者。恶的问题追问全能全善的上帝为何允许苦难；神义论包括自由意志和灵魂塑造，它们主张恶是道德成长或自由选择所必需的。
10. Logic and Argumentation | 逻辑与论证
An argument is a set of premises intended to support a conclusion; good arguments are valid or strong and have true premises. Identifying premises and conclusions is the first step in evaluating any philosophical claim.
论证是一组旨在支持结论的前提；好的论证有效或有力，并且前提为真。识别前提和结论是评估任何哲学主张的第一步。
Deductive arguments guarantee the conclusion if premises are true; inductive arguments make the conclusion probable. A valid deductive argument with true premises is called sound.
演绎论证在前提到位时保证结论；归纳论证使结论具有可能性。一个有效且前提为真的演绎论证被称为可靠论证。
Common fallacies include ad hominem, straw man, false dilemma, and circular reasoning. In exam answers, define the argument, identify premises and conclusion, then evaluate truth and validity or strength before stating whether the argument succeeds.
常见谬误包括人身攻击、稻草人、虚假两难和循环论证。在考试回答中，先定义论证，辨明前提与结论，然后评估真实性以及有效性或力度，最后说明该论证是否成立。
11. Exam Skills: Evaluating Philosophical Claims | 考试技巧：评估哲学主张
IGCSE philosophy questions often ask you to explain a view, give arguments for and against, and reach a justified conclusion. Simply describing a theory is not enough; you must evaluate it.
IGCSE 哲学考题常要求解释某一观点，给出正反论证，并得出有理由支持的结论。仅仅描述理论是不够的；你必须对它进行评估。
Use the PEEL structure: Point, Evidence or example, Evaluation or explanation, Link back to the question. This keeps your answer focused and shows the examiner how each paragraph supports your argument.
使用 PEEL 结构：观点、证据或例子、评估或解释、回扣题目。这能保持答案重点突出，并向考官展示每一段如何支持你的论证。
Show balance by discussing strengths and weaknesses of each theory before stating your own judgement. Use precise terminology such as ‘a priori’, ‘a posteriori’, ‘valid’, ‘sound’, ‘maxim’, and ‘hypothetical imperative’ to demonstrate conceptual understanding.
通过讨论每种理论的长处与不足来展示平衡，然后再陈述自己的判断。使用精确术语，如’先验’、’后验’、’有效’、’可靠’、’准则’
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