AS CAIE Philosophy: Core Knowledge Summary | AS CAIE 哲学核心知识点梳理

📚 AS CAIE Philosophy: Core Knowledge Summary | AS CAIE 哲学核心知识点梳理

This article provides a clear and structured overview of the core themes in the CAIE AS Philosophy syllabus (9696). It covers the main topics in Epistemology and Ethics, highlighting key definitions, arguments, and responses to classical problems. Whether you are revising for your mocks or preparing for the final exam, this summary will help you anchor your understanding and link concepts together.

本文为 CAIE AS 哲学（9696）课程的核心主题提供清晰且结构化的梳理。内容覆盖认识论和伦理学的主要议题，突出关键定义、论证以及对经典问题的回应。无论你是在准备模拟考还是为最终大考复习，这份梳理都能帮助你巩固理解，串联概念。

1. What is Knowledge? | 什么是知识？

In epistemology, the traditional starting point is the question ‘What does it mean to know something?’ Most philosophical discussions begin with propositional knowledge (knowing that something is the case) rather than acquaintance knowledge or practical knowledge. A classic analysis attempts to give necessary and sufficient conditions for a person S to know a proposition P.

在认识论中，传统的起点是“知道某事意味着什么”。多数哲学讨论从命题性知识（知道某事为真）出发，而非亲知知识或技能知识。经典分析试图给出一个人 S 知道命题 P 的必要且充分的条件。

The analysis most students encounter first is the tripartite definition: knowledge is justified true belief (JTB). This means that S knows that P if and only if: (1) S believes that P, (2) P is true, and (3) S is justified in believing that P. Each condition is taken to be necessary and, together, jointly sufficient.

学生最先接触到的分析是三元定义：知识是得到辩护的真信念（JTB）。这意味着 S 知道 P，当且仅当：（1）S 相信 P，（2）P 为真，（3）S 有理由相信 P 是得到辩护的。每一个条件都被视为必要的，且三者结合构成充分条件。

2. The Tripartite Definition and Its Conditions | 三元定义及其条件

The belief condition rules out cases where a person simply guesses correctly without actually holding the belief. The truth condition ensures that knowledge is factive – you cannot know something false. The justification condition aims to distinguish knowledge from lucky true beliefs; it requires that the believer has good reasons or evidence.

信念条件排除了一个人纯粹猜对却不真正持有的情形。真值条件确保知识是事实性的——你不可能知道一个假的东西。辩护条件则试图将知识与碰巧为真的信念区分开；它要求认知者持有好的理由或证据。

Philosophers have debated the nature of justification. Foundationalism claims some beliefs are basic and justify others, while coherentism argues that beliefs are justified by their mutual coherence within a system. Internalism holds that justification depends on factors inside the subject’s mind, whereas externalism allows justification to depend on reliable processes the subject may not be aware of.

哲学家们就辩护的本质展开争论。基础主义主张某些信念是基础的，并且用来辩护其他信念；融贯主义则认为信念的辩护来自它们在信念系统内部的相互融贯。内在论认为辩护取决于主体心智内部的因素，而外在论则允许辩护依赖于主体可能未意识到的可靠过程。

3. Gettier’s Challenge | 盖梯尔的挑战

In 1963, Edmund Gettier published a short paper demonstrating that JTB is not sufficient for knowledge. He constructed counterexamples where a person has a justified true belief but intuitively does not know. One style involves inference from a justified false belief to a true conclusion by luck. For instance, Smith has strong evidence that Jones owns a Ford. From this he justifiably believes ‘Jones owns a Ford or Brown is in Barcelona.’ It turns out Jones does not own a Ford, but by coincidence Brown is in Barcelona. Smith’s belief is justified and true, yet we would not say he knows it.

1963 年，埃德蒙·盖梯尔发表了一篇简短的论文，证明 JTB 不足以构成知识。他构造了反例：某人的信念得到辩护且为真，但直觉上并不算知道。其中一类反例涉及从得到辩护的假信念出发，经由巧合推出一个真结论。例如，史密斯有强证据相信琼斯拥有一辆福特车，于是他辩护地相信“琼斯拥有福特车，或者布朗在巴塞罗那”。结果琼斯并没有福特车，但布朗碰巧真的在巴塞罗那。史密斯的信念得到辩护且为真，可我们不会说他拥有知识。

Gettier cases reveal that justification and truth can come apart in a lucky way. Since then, epistemologists have tried to add a fourth condition or replace justification entirely to exclude these lucky true beliefs.

盖梯尔案例揭示出辩护与真可能以一种碰巧的方式分离。此后，认识论者试图添加第四个条件，或完全替换辩护，以排除这类碰巧为真的信念。

4. Responses to Gettier: No False Lemmas and Reliabilism | 对盖梯尔问题的回应：无假前提与可靠主义

One early response is the no false lemmas condition: knowledge is justified true belief that is not inferred from any false proposition. In the Smith case, the inference relies on the false lemma ‘Jones owns a Ford,’ so the condition would rule it out. However, some have proposed cases where no false lemma is involved, yet knowledge seems absent.

一个早期的回应是无假前提条件：知识是不依赖于任何假命题推论出来的得到辩护的真信念。在史密斯的案例中，推论依赖于“琼斯拥有一辆福特”这个假前提，因此该条件会将其排除。然而，也有人提出有些案例并未涉及假前提，但知识似乎仍然缺失。

Reliabilism takes an externalist approach: a belief counts as knowledge if it is true and produced by a reliable cognitive process, whether or not the subject has access to reasons. A reliable process is one that tends to produce true beliefs, like perception or memory in normal conditions. Reliabilism handles standard Gettier cases because the lucky connection is not typically generated by a reliable process. Yet it faces challenges, such as the generality problem (how to individuate processes) and cases where a reliable process is accidentally reliable in a specific environment.

可靠主义采取外在论路径：如果一个信念为真，且由一个可靠的认知过程产生，那么它就是知识，无论主体能否给出理由。可靠过程是那种在正常条件下倾向于产生真信念的过程，如知觉或记忆。可靠主义能处理标准的盖梯尔案例，因为碰巧的连接通常不是由可靠过程生成的。但它也面临挑战，比如普遍性问题（如何将过程个体化）以及在特定环境中可靠过程只是偶然可靠的案例。

5. Perception: Direct vs Indirect Realism | 知觉：直接实在论与间接实在论

Perception is a fundamental source of knowledge about the external world. Direct realism asserts that we perceive physical objects directly without any intermediary. When you look at a tree, you are directly aware of the tree itself. This view faces the argument from illusion: if a stick appears bent in water, you are perceiving something that is not the actual property of the stick, suggesting you are directly aware of a sense-datum, not the object.

知觉是关于外部世界知识的基本来源。直接实在论主张我们直接感知物理对象，并无任何中介。当你看着一棵树，你直接意识到树本身。这一观点面临错觉论证：一根直棍在水中看起来是弯的，你感知到的并非棍子的实际属性，这暗示你直接意识到的是感觉材料，而非物体本身。

Indirect realism thus holds that we perceive physical objects via mental intermediaries (sense-data). Locke’s representative realism distinguishes primary qualities (shape, size, motion) that resemble the object from secondary qualities (colour, taste, sound) that do not. The main problem for indirect realism is scepticism about the external world: if we only ever access sense-data, how can we know that physical objects resemble them or even exist? Berkeley’s idealism eliminates the physical world entirely, arguing that objects are collections of ideas.

间接实在论因此认为，我们通过心理中介（感觉材料）来感知物理对象。洛克的表象实在论区分了与物体相似的第一性质（形状、大小、运动）和不相似的第二性质（颜色、味道、声音）。间接实在论的主要困难是外部世界怀疑论：若我们只能接近感觉材料，何以知道物理对象与之相似，甚至存在？贝克莱的唯心论则完全取消了物理世界，主张物体无非是观念的集合。

6. Scepticism and Responses | 怀疑论及其回应

Philosophical scepticism about knowledge questions whether we can have any knowledge at all. Global scepticism employs scenarios like the brain in a vat or Descartes’ evil demon to suggest that all our experiences could be deceptive. The sceptical argument typically runs: (1) If I know that P (e.g., I have hands), then I know that I am not a brain in a vat. (2) I do not know that I am not a brain in a vat. (3) Therefore, I do not know that P.

关于知识的哲学怀疑论质疑我们是否真能拥有任何知识。全面怀疑论运用缸中之脑或笛卡尔的恶魔等设想，暗示我们所有的经验都可能具有欺骗性。怀疑论的论证通常如下：（1）如果我知道 P（如，我有手），那么我就知道我不是缸中之脑。（2）我不知道我不是缸中之脑。（3）因此，我不知道 P。

Responses include Moore’s common-sense argument, which simply reverses the reasoning: I do know I have hands, so I can know I am not a brain in a vat. Contextualism argues that knowledge claims are true relative to everyday contexts but may be false in philosophical sceptical contexts. Reliabilism can respond that our perceptual processes are reliable in our actual environment, even if they would fail in sceptical worlds.

回应包括摩尔常识论证，该论证简单倒转了推理：我确实知道我有手，因此我能知道我不是缸中之脑。语境主义主张知识声称在日常语境中为真，但在哲学怀疑论语境下可能为假。可靠主义则能回应说，我们的知觉过程在现实环境中是可靠的，即便在怀疑论世界里会失效。

7. Utilitarianism: The Greatest Happiness Principle | 功利主义：最大幸福原则

Normative ethics asks how we ought to act. Utilitarianism is a consequentialist theory holding that the right action is the one that maximises overall happiness or utility. Classical utilitarianism, as developed by Jeremy Bentham and John Stuart Mill, is hedonistic: it equates utility with pleasure and the absence of pain. Bentham proposed an impartial calculus considering intensity, duration, certainty etc. Mill introduced the distinction between higher and lower pleasures, famously claiming it is ‘better to be a human being dissatisfied than a pig satisfied.’

规范伦理学追问我们应该如何行动。功利主义是一种后果论，主张正确的行为就是能最大化总体幸福或效用的行为。古典功利主义由边沁和密尔发展，是享乐主义的：它将效用等同于快乐和痛苦的缺席。边沁提出了一个不偏不倚的计算法，考虑强度、时长、确定性等。密尔引入了高级快乐与低级快乐的区分，并有名言称“宁做一个不满足的人，也不做一头满足的猪”。

Act utilitarianism applies the principle directly to individual acts, while rule utilitarianism evaluates the utility of following general rules. Both face objections: act utilitarianism seems to permit injustices (punishing an innocent if it produces greater overall happiness), and rule utilitarianism may collapse into act utilitarianism or generate irrational rule-following.

行为功利主义将原则直接应用于单个行为，而规则功利主义则评估遵守一般规则的效用。两者都面临批判：行为功利主义似乎容许不正义（若惩罚无辜者能带来更大的总体幸福），规则功利主义则可能滑向行为功利主义，或导致非理性的盲目守则。

8. Kantian Deontology | 康德义务论

Immanuel Kant’s deontological ethics is based on the idea that morality is grounded in reason and duty, not in consequences. The core is the Categorical Imperative, an unconditional moral command. Kant provides several formulations. The Formula of Universal Law: ‘Act only according to that maxim whereby you can at the same time will that it should become a universal law.’ This tests moral rules by consistency: if a maxim leads to a contradiction in conception or in will when universalised, it is impermissible.

康德的义务论伦理学立基于理性和义务，而非后果。其核心是定言命令，一条无条件的道德律令。康德给出了不同表述。普遍法则公式是：“只按照你同时能够愿意它成为一条普遍法则的那个准则去行动。” 这通过一致性检验道德规则：如果一个准则在普遍化时导致设想上的矛盾或意愿上的矛盾，它就是不被允许的。

The Formula of Humanity requires that we treat humanity, whether in ourselves or others, always as an end in itself and never merely as a means. This grounds the absolute prohibition against using people, such as in lying or deception. Kant’s theory respects autonomy and the intrinsic worth of rational beings, but critics argue it is too rigid—it seems to forbid lying even to save a life—and its formal nature can be manipulated by contriving maxims.

人性质公式要求我们始终将人性——无论是自身还是他人——当作目的本身，而绝不仅仅当作手段。这为禁止利用人（如撒谎、欺骗）提供了绝对依据。康德理论尊重自主性和理性存在者的内在价值，但批评者认为它过于僵硬——似乎连为救命而撒谎也禁止——且其形式化特征可通过刻意构造准则加以操纵。

9. Aristotle’s Virtue Ethics | 亚里士多德的德性伦理

Virtue ethics focuses on character rather than rules or consequences. Aristotle’s version, developed in the Nicomachean Ethics, asks what the good life (eudaimonia) consists in and what virtues a person needs to flourish. Eudemonia is not a subjective feeling but an objective state of rational activity in accordance with virtue. Virtues are character traits that enable us to live well.

德性伦理关注的是品格而非规则或后果。亚里士多德在《尼各马可伦理学》中发展的版本，追问良善生活（eudaimonia，幸福/繁盛）在于什么，以及一个人需要哪些德性来繁盛。Eudaimonia 不是主观感受，而是一种符合德性的理性活动的客观状态。德性就是使我们活得好的品格特质。

The doctrine of the mean holds that a virtue is a disposition to choose the intermediate between excess and deficiency in emotions and actions. For example, courage is the mean between cowardice and rashness. This is not a strict arithmetic mean but relative to the individual and the situation, to be determined by practical wisdom (phronesis). Critics note the doctrine is vague, may not apply to all virtues (e.g., justice), and provides insufficient action-guidance in moral dilemmas.

中庸之道主张，德性是一种在情感与行动上选择过度与不及之中间状态的品质倾向。例如，勇敢是鲁莽与怯懦之间的中道。这不是严格算术上的平均，而是相对于个人与情境，由实践智慧（phronesis）来决定。批评者指出该理论含糊不清，可能不适用于所有德性（如正义），并且在道德困境中提供的行动指导不足。

10. Meta-ethics: Cognitivism vs Non-Cognitivism | 元伦理：认知主义与非认知主义

Meta-ethics examines what we are doing when we use moral language. Cognitivism holds that moral statements express beliefs that can be true or false. Moral realism, a form of cognitivism, claims there are mind-independent moral facts. Naturalism (e.g., utilitarianism as a naturalistic theory) identifies moral properties with natural properties like pleasure. Non-naturalism (Moore) argues that ‘good’ is a simple, non-natural property, and the naturalistic fallacy is committed when one tries to define it in natural terms. Error theory (Mackie) combines cognitivism with anti-realism: moral statements aim to state facts but all such statements are false because no objective moral values exist.

元伦理考察我们使用道德语言时究竟在做什么。认知主义主张道德陈述表达可判断真假的信念。道德实在论是认知主义的一种，声称存在独立于心灵的道德事实。自然主义（如作为自然主义理论的功利主义）将道德属性等同于自然属性（如快乐）。非自然主义（摩尔）则认为“善”是单纯的、非自然的属性，任何试图用自然术语来定义它的做法都犯了自然主义谬误。错误论（麦基）将认知主义与反实在论结合：道德陈述意在陈述事实，但所有这些陈述都是假的，因为没有客观的道德价值存在。

Non-cognitivism claims that moral utterances do not express beliefs and are not truth-apt. Emotivism (Ayer, Stevenson) holds that moral statements express emotional attitudes or commands – ‘Murder is wrong’ essentially means ‘Boo to murder!’ Prescriptivism (Hare) argues that moral language prescribes universalisable actions, so ‘ought’ statements commend and guide choices. Non-cognitivism avoids the metaphysical burden of moral facts but struggles to explain moral reasoning, disagreement, and the logical behaviour of moral terms in complex sentences.

非认知主义主张道德话语并不表达信念，且不具备真假值。情感主义（艾耶尔、史蒂文森）认为，道德陈述表达情感态度或命令——“谋杀是错的”本质上等于“呸！谋杀！”。规定主义（黑尔）则认为道德语言是在规定可普遍化的行动，因此“应当”陈述是在赞扬并指引选择。非认知主义避免了道德事实的形而上学负担，但难以解释道德推理、道德分歧以及道德词语在复杂语句中的逻辑表现。

11. Applied Ethics: Abortion and Euthanasia | 应用伦理：堕胎与安乐死

In the CAIE AS course, students apply normative theories to practical issues. In the abortion debate, the moral status of the foetus is central. Conservative positions often appeal to the sanctity of life or the potential personhood argument; liberals emphasise women’s bodily autonomy and the distinction between a person and a potential person. Utilitarianism may focus on the balance of happiness versus suffering, while Kantian ethics might ask whether abortion treats any rational being merely as a means.

在 CAIE AS 课程中，学生要将规范理论应用于实际议题。在堕胎争论中，胎儿的道德地位是核心。保守立场常诉诸生命神圣性或潜在位格论论证；自由立场则强调女性的身体自主权以及位格与潜在位格的区别。功利主义可能关注幸福与痛苦的平衡，而康德伦理学则会追问堕胎是否将任何理性存在者仅仅当作手段。

Regarding euthanasia, the distinction between active and passive euthanasia, and between voluntary, non-voluntary and involuntary, is crucial. Arguments for legalisation often cite the relief of suffering and respect for autonomy (dignity in dying). Objections include the slippery slope argument, the potential violation of the doctor’s role, and the sanctity of life principle. Virtue ethics might consider what a compassionate and wise person would do, while utilitarianism weighs the consequences.

在安乐死问题上，主动与被动安乐死，以及自愿、非自愿和违背意愿之间的区分至关重要。支持合法化的论证常引用解除痛苦和尊重自主性（有尊严地离世）。反对理由包括滑坡论证、对医生角色的潜在违背以及生命神圣原则。德性伦理可能追问什么是一个富有同情心且有智慧的人会做的，功利主义则权衡后果。

---

Published by TutorHao | Philosophy Revision Series | aleveler.com

更多咨询请联系16621398022（同微信）