重点摘要
1. 心身问题延伸至宇宙层面
本书旨在论证,心身问题不仅仅是局限于生物体内心智、大脑与行为关系的局部问题,而是深入影响我们对整个宇宙及其历史的理解。
超越局部问题。 传统的心身问题关注个体生物中心理状态与物理过程的关系,然而这并非单纯的局部问题。它具有深远的意义,影响我们对宇宙整体及其演变历史的认知。这一视角表明,心身问题不仅属于心灵哲学范畴,更涉及宇宙学和科学基础。
重新审视科学知识。 哲学应探讨即便是最成功的科学知识的局限性。我们应抵制认为现有工具足以理解整个宇宙的诱惑。认识到这些局限,或将引领我们发现新的科学理解形式。
挑战还原论。 作者针对从生物学、化学和物理学推演出的综合世界观提出质疑,该观点假设这些科学之间存在层级关系,且通过统一它们可以完整解释一切。这种还原主义物质论被广泛视为唯一严肃可能,但作者对此持反对态度。
2. 物质主义新达尔文主义可能是错误的
我的目标是一个通过生物学、化学和物理学某些发现推演出的综合性、推测性世界观——一种特定的自然主义世界观,假设这些科学之间存在层级关系,并原则上通过它们的统一可以完整解释宇宙中的一切。
对还原论的怀疑。 作者支持对新达尔文主义关于生命起源和进化的还原论解释持怀疑态度。生命如我们所知,竟然仅是物理偶然事件与自然选择的结果,似乎难以令人信服。这种怀疑并非基于宗教信仰,而是基于现有科学证据并不合理地要求我们放弃常识。
概率问题。 关于生命通过偶然突变和自然选择进化,以及无生命物质形成能进行此类进化的物理系统,存在严重的概率难题,而这些问题尚未被充分重视。随着我们对遗传密码复杂性的了解加深,这些问题愈发突出。
挑战共识。 主流观点认为生命从无生命物质中出现,并通过偶然突变和自然选择演化至今,完全依赖物理法则的运作,这一观点并非无懈可击。它更多是科学项目的假设,而非经过充分验证的科学假说。
3. 反还原主义揭示物理科学的局限
如果还原在某些方面失败,这表明物理科学的适用范围有限,必须由其他因素补充以解释缺失的部分。
超越物理解释。 反还原主义论证表明,物理科学单独无法完全解释某些现象。可能需要其他理解形式,或者现实中存在即使是最完善的物理学也无法描述的内容。这揭示了物理科学的边界。
心灵的核心地位。 如果心灵本身不仅仅是物理的,那么物理科学无法完全解释它。我们难以避免得出结论:那些带有心灵特征的物理构成部分,也无法被物理科学完全解释。这为一种与物质主义截然不同的自然秩序观打开了可能——心灵居于核心,而非物理法则的附属产物。
需要全面替代方案。 缺乏任何全面替代方案,促使各种还原主义计划在心灵、价值和意义领域持续存在,尽管它们本身难以令人信服。真正的替代方案必须解释心灵及其相关一切如何内在于宇宙。
4. 意识不可还原且根本
意识是依赖物理科学资源的全面自然主义面临的最显著障碍。
意识作为障碍。 意识是全面自然主义中最显著的障碍,后者仅依赖物理科学资源。意识的存在似乎表明,尽管物理对宇宙的描述丰富且具解释力,但它仅是部分真相。
还原论的失败。 物质主义前进道路上的多次死胡同表明,现代科学诞生时引入的Ψ/Φ二元论可能比许多人想象的更难摆脱。意识主体及其心理生活是现实中不可回避的组成部分,物理科学无法描述。
需要概念革命。 心身问题本就复杂,我们应对用为解释截然不同事物而发展出的概念和方法试图解决它持怀疑态度。该领域的理论进展至少需要一场与相对论一样激进的概念革命。
5. 进化自然主义削弱理性基础
进化自然主义意味着我们不应认真对待任何信念,包括进化自然主义自身所依赖的科学世界观。
削弱可靠性。 进化自然主义对我们能力的解释削弱了其可靠性,进而削弱了自身。那些在日常生存斗争中具有选择优势的信念形成机制,并不足以让我们对构建整体世界理论抱有信心。
道德实在论与进化。 进化自我理解几乎必然要求我们放弃道德实在论——即我们道德判断独立于信念而真实或虚假的自然信念。进化自然主义意味着我们不应认真对待任何信念,包括其自身所依赖的科学世界观。
理性的权威。 进化论故事使理性的权威地位大为削弱。对我们的道德及其他规范能力更是如此——我们常依赖它们来纠正本能。
6. 价值实在论挑战自然主义解释
实在论将价值视为一种发现过程的结果,从最初类似感知信念的价值表象出发,逐步(我们希望如此)走向对如何生活的更好理解。
价值判断与动机。 价值在自然界中的地位问题不仅涉及意识和认知,更关乎实践领域——行为的控制与评估。显然,价值的存在及我们对其的反应依赖于意识和认知。
实在论与主观主义之争。 实在论与主观主义的争论并非关于宇宙内容,而是关于规范性解释的秩序。实在论者认为,道德及其他评价判断常可通过更一般或基本的评价真理及其相关事实来解释。
与达尔文主义不兼容。 作者赞同Sharon Street的观点,认为道德实在论与达尔文主义对道德及评价判断能力进化影响的解释不兼容。既然道德实在论为真,达尔文主义对道德判断动机的解释必为假,尽管科学界对此持共识。
7. 目的论提供潜在解决方案
我认为目的论是一种自然主义替代方案,有别于偶然、创造论和无方向的物理法则这三种候选解释。
目的论作为自然主义替代。 目的论是一种自然主义替代方案,区别于偶然、创造论和无方向的物理法则。为避免White指出的非意图性偏见假设的错误,目的论必须在其使某些结果可能性受限的同时,不依赖意图或动机。
目的论法则。 目的论意味着某些自然法则不同于迄今发现的基本科学法则,它们在时间上具有历史性。物理法则是普适关系的方程,适用于任何时间和地点的数学可描述量。
组织与发展原则。 自然主义目的论意味着此类组织和发展原则是自然秩序中不可还原的组成部分,而非任何人有意或有目的影响的结果。
8. 宇宙正逐渐觉醒
我们每个人的生命,都是宇宙逐渐觉醒并意识到自身的漫长过程的一部分。
认知转变。 伟大的认知转变是意识从特定生物生命中所包含的视角形式,扩展到既个体又主体间存在的客观、包罗万象的形式。它最初是生物进化过程,在我们物种中已成为集体文化过程。
更大过程的一部分。 我们每个人的生命,都是宇宙逐渐觉醒并意识到自身的漫长过程的一部分。这一视角强调个体意识与更大宇宙过程的相互关联。
超越物质主义。 为现实地理解我们关于价值和理由的问题与判断,必须拒绝它们源自偶然加自然选择形成的能力,或是自然选择的附带副产品,或是基因漂变产物的观点。
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FAQ
What's "Mind & Cosmos" about?
- Challenging Materialism: "Mind & Cosmos" by Thomas Nagel argues against the materialist neo-Darwinian conception of nature, suggesting it is almost certainly false.
- Mind-Body Problem: The book explores the mind-body problem, asserting that it is not just a local issue but one that affects our understanding of the entire cosmos.
- Limits of Science: Nagel questions the limits of contemporary scientific knowledge, particularly its ability to fully explain consciousness, cognition, and value.
- Alternative Conceptions: The book proposes that a new understanding of the natural order is needed, one that includes mind as a fundamental aspect of nature.
Why should I read "Mind & Cosmos"?
- Philosophical Inquiry: It offers a deep philosophical inquiry into the nature of consciousness and its place in the universe.
- Critique of Reductionism: The book provides a critical examination of reductionist approaches in science, particularly in biology and physics.
- Exploration of Alternatives: Nagel explores alternative conceptions of nature that could potentially integrate mind and consciousness into the natural order.
- Intellectual Challenge: It challenges widely held scientific and philosophical assumptions, encouraging readers to think critically about the nature of reality.
What are the key takeaways of "Mind & Cosmos"?
- Mind as Fundamental: Nagel argues that mind is a fundamental aspect of nature, not just a byproduct of physical processes.
- Limits of Neo-Darwinism: The book critiques the neo-Darwinian framework for its inability to fully account for consciousness and cognition.
- Need for New Theories: Nagel suggests that new theories are needed to explain the emergence of life and consciousness in the universe.
- Teleology and Value: The book discusses the possibility of teleological principles in nature, which could explain the existence of value and purpose.
What are the best quotes from "Mind & Cosmos" and what do they mean?
- "The world is an astonishing place...": This quote emphasizes the complexity and wonder of the universe, challenging the notion that current scientific tools are sufficient to understand it.
- "Consciousness is the most conspicuous obstacle...": Nagel highlights consciousness as a major challenge to materialist explanations, suggesting it requires a different kind of understanding.
- "The idea of teleology as part of the natural order...": This quote introduces the concept of teleology, proposing that natural laws might include principles that guide the development of life and consciousness.
- "The human will to believe is inexhaustible.": Nagel reflects on the persistent human desire to find meaning and understanding, even in the face of scientific uncertainty.
How does Thomas Nagel critique the materialist neo-Darwinian conception of nature?
- Inadequate Explanation: Nagel argues that the materialist neo-Darwinian framework fails to adequately explain consciousness, cognition, and value.
- Reductionism's Limits: He critiques the reductionist approach for its inability to account for the subjective nature of consciousness.
- Complexity of Life: Nagel questions the likelihood that life and consciousness could arise purely from physical processes and natural selection.
- Need for New Frameworks: He suggests that new frameworks are needed to integrate mind and consciousness into our understanding of the natural world.
What is Nagel's view on consciousness in "Mind & Cosmos"?
- Irreducibility: Nagel argues that consciousness is irreducible to physical processes and cannot be fully explained by current scientific theories.
- Subjective Experience: He emphasizes the subjective nature of consciousness, which poses a challenge to objective scientific explanations.
- Central to Nature: Nagel suggests that consciousness is a central aspect of nature, not just an accidental byproduct of evolution.
- Call for New Theories: He calls for new theories that can account for the emergence and nature of consciousness within the natural order.
How does "Mind & Cosmos" address the mind-body problem?
- Beyond Local Problem: Nagel argues that the mind-body problem is not just about the relationship between mind and brain but affects our understanding of the entire cosmos.
- Challenge to Physicalism: He challenges the physicalist view that everything about the mind can be explained by physical science.
- Need for Integration: Nagel suggests that a new understanding is needed that integrates mind as a fundamental aspect of the natural order.
- Philosophical Task: He views the investigation of the limits of scientific knowledge as a legitimate philosophical task, necessary for understanding the mind-body problem.
What does Nagel propose as an alternative to materialist reductionism?
- Neutral Monism: Nagel favors some form of neutral monism, which posits that mind and matter are two aspects of a more fundamental reality.
- Teleological Principles: He suggests the possibility of teleological principles in nature that guide the development of life and consciousness.
- Expanded Natural Order: Nagel calls for an expanded conception of the natural order that includes mind and consciousness as fundamental elements.
- Integration of Mind: He proposes that any new framework must integrate mind and consciousness into our understanding of the universe.
How does "Mind & Cosmos" explore the concept of teleology?
- Natural Teleology: Nagel explores the idea of natural teleology, where certain outcomes are favored by natural laws without the need for a designer.
- Value and Purpose: He suggests that teleological principles could explain the existence of value and purpose in the universe.
- Historical Explanation: Teleology could provide a historical explanation for the development of life and consciousness, beyond mere chance or necessity.
- Challenge to Science: This concept challenges the current scientific paradigm, which excludes teleological explanations from its framework.
What role does value play in Nagel's argument in "Mind & Cosmos"?
- Real Value: Nagel argues for the reality of value, suggesting that it is not merely a product of human responses but an objective aspect of the world.
- Challenge to Darwinism: He contends that Darwinian explanations cannot account for the existence of objective value and moral truths.
- Integration with Nature: Nagel suggests that an adequate understanding of the natural order must include an explanation of how value arises and is recognized.
- Teleological Implications: The existence of value may imply teleological principles in nature, guiding the development of life and consciousness.
How does Nagel address the concept of cognition in "Mind & Cosmos"?
- Beyond Physicalism: Nagel argues that cognition, like consciousness, cannot be fully explained by physical processes alone.
- Objective Truth: He emphasizes the capacity of human reason to discover objective truths about the world, which challenges reductionist explanations.
- Evolutionary Explanation: Nagel questions whether evolutionary theory can adequately explain the development of human cognitive capacities.
- Need for New Theories: He calls for new theories that can account for the emergence of reason and its role in understanding the universe.
What are the implications of "Mind & Cosmos" for the future of scientific inquiry?
- Limits of Current Science: Nagel highlights the limits of current scientific methods in explaining consciousness, cognition, and value.
- Call for New Paradigms: He suggests that new paradigms are needed that integrate mind and consciousness into the natural order.
- Philosophical Exploration: The book encourages philosophical exploration of the fundamental nature of reality, beyond the constraints of materialism.
- Challenge to Consensus: Nagel challenges the scientific consensus, advocating for a more open-minded approach to understanding the universe.
评论
托马斯·内格尔的《心灵与宇宙》对物质主义的新达尔文主义提出质疑,认为其无法解释意识、理性与价值。内格尔主张一种目的论的自然观,认为宇宙本身具有向生命与心灵发展的内在倾向。尽管有人赞赏内格尔质疑科学正统观点时的坦诚与勇气,但也有人批评他缺乏科学专业知识和实证依据。该书因内格尔对智能设计论点表现出的某种同情态度而引发争议,尽管他本人是无神论者。评论界对本书评价不一,有人认为其发人深省,也有人视之为误入歧途。
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