UPSC Civil Services (Main) Examination 2026 — Philosophy Optional Paper I: Questions with Model Answers | Plutus IAS

08 Sep UPSC Civil Services (Main) Examination 2026 — Philosophy Optional Paper I: Questions with Model Answers | Plutus IAS

The questions below are from Philosophy Optional Paper I of UPSC Civil Services (Main) Examination 2026 (held 2026-08-30) — the actual paper, which is public. Each carries a model answer written by Aanya in Plutus IAS teaching style, to the marks and word limit.

Official source: official (upsc.gov.in).

Q1. Answer the following questions in about 150 words each : 10×5=50 (a) How does Spinoza explain the relationship between states of mind and bodily processes? (b) Explain the distinction between Intuitive knowledge and Demonstrative knowledge as propounded by Locke. (c) Explain Hegel's idea that the concept of the Absolute as being is the concept of the Absolute as becoming as a process of self-development. (d) Compare and contrast the notion of entelechy as presented in Aristotle's and Leibniz's philosophy. (e) "I can prove now, for instance, that two human hands exist." How does Moore use this illustration to prove the existence of an external world? Critically discuss. (15 marks)

How to approach this question

The directive word is “explain”, so the examiner wants a clear exposition of the philosopher’s distinction between two kinds of knowledge, not a critique or comparison. The question has a two-part structure: (1) define each type, and (2) illustrate with Lockean examples. The common mistake is to confuse intuitive knowledge with empirical knowledge; Locke reserves “intuitive” for the highest, immediate certainty of ideas, not for sensory experience.

Model answer

Locke’s epistemology in An Essay Concerning Human Understanding classifies knowledge into two degrees: intuitive and demonstrative.

Intuitive knowledge is the highest and most certain kind; it is an immediate perception of the agreement or disagreement between two ideas without any intermediate steps. For Locke, it is “the clearest and most certain that human frailty is capable of.” An example is the intuitive grasp that “a triangle has three angles equal to two right angles,” where the mind sees the agreement instantly.

Demonstrative knowledge, by contrast, is mediated certainty; it reaches agreement only through a chain of intermediate ideas or steps, each of which must be itself intuitive. Thus, the proof that “the three angles of a triangle equal two right angles” is demonstrative because it proceeds through axioms and intermediate propositions, each of which is itself intuitively known. Because it depends on a series of steps, demonstrative knowledge is less certain and more prone to error.

Locke thereby reserves intuitive knowledge for the most foundational and indubitable truths, while demonstrative knowledge, though still certain, is dependent on the clarity and correctness of each step in the reasoning process.

Q2. (a) What, according to Aristotle, is the fundamental problem of metaphysics? Discuss this in relation with Aristotle's account of the essence of the world, where he rejects the views of both the Atomists and Plato. (b) How does Hume account for ideas of reason? How does Kant respond to Hume's views in this regard? Critically discuss. (c) Describe Sartre's notion of consciousness as 'nothing'. How is it different from Husserl's notion of consciousness? Discuss. (15 marks)

How to approach this question

The directive word “Discuss” signals that the examiner wants a structured argument: (1) a clear identification of the thinker’s core thesis, (2) an exposition of the internal logic or argumentative steps, and (3) a critical comparison or evaluation. The most common mistake is to treat the thinkers as isolated monoliths; the top answer weaves their doctrines into a dialogue. For Aristotle, focus on the rejection of Atomists and Plato; for Hume and Kant, trace the epistemological shift from impressions to categories; for Sartre vs Husserl, foreground the shift from intentional structure to existential nothingness.

Model answer

Aristotle’s Fundamental Problem of Metaphysics

For Aristotle, the fundamental problem of metaphysics is to determine the ousia or substance that grounds the being of everything that is. He rejects the Atomists’ reduction of reality to indivisible bodies moving in the void and Plato’s separation of eternal Forms from sensible particulars. Instead, Aristotle advances hylomorphism: every substance is a composite of matter (hyle) and form (morphe). The form is the essence (to ti ēn einai) that makes a thing what it is—e.g., the form of humanity in Socrates. This essence is neither a transcendent Form nor a material particle, but the immanent organizing principle that actualizes potentiality.

Hume on Ideas of Reason and Kant’s Response

Hume treats all ideas as copies of impressions; even the idea of necessary connection collapses into habitual association. Reason, for Hume, is the slave of the passions and yields no substantive knowledge of the world. Kant radicalizes this insight: reason does not mirror reality but actively structures it through the twelve categories and the schematism. Where Hume saw only constant conjunction, Kant discovered the transcendental unity of apperception that makes experience possible. The Copernican Revolution thus transforms metaphysics from a dogmatic inquiry into objects to a critical examination of the conditions of possible experience.

Sartre’s Consciousness as Nothingness vs Husserl’s Intentional Consciousness

Husserl defines consciousness as intentional: it is always consciousness of something—e.g., a perception of a tree or a memory of Paris. Consciousness has no interior content apart from its directedness. Sartre radicalizes this insight by arguing that human consciousness (pour-soi) is fundamentally nothingness. Unlike the en-soi of objects—solid, self-identical, and full—consciousness is a lack, a void that can negate any given state of affairs. While Husserl brackets the world to study structures of intentionality, Sartre insists that consciousness is an ongoing project of self-creation and responsibility. Where Husserl seeks descriptive essences, Sartre embraces radical freedom and the anguish that accompanies it.

Conclusion

Aristotle’s hylomorphism, Hume’s empiricism, Husserl’s intentional analysis, and Sartre’s existential nothingness together map the trajectory from classical substance metaphysics to twentieth-century existential phenomenology. Each thinker reconfigures the relation between mind and world—whether through form, habit, intentionality, or negation—thereby redefining the very meaning of metaphysics and ethics.

Q3. (a) Why are states of consciousness ascribed to anything at all and why are they ascribed to the same things to which we also ascribe physical properties? How does Strawson answer these questions in his work *Individuals*? (b) Explain Heidegger's conception of authenticity and inauthenticity as modes of Dasein's being. (c) Can words be viewed as the ideas in the mind of the person who uses them? Answer with reference to the philosophy of later Wittgenstein. (15 marks)

How to approach this question

The directive word “Why” in part (a) tests your ability to explain the rationale behind ascriptions of consciousness and physical properties, while the “How” probes Strawson’s argument in Individuals. Examiners expect a three-part structure: (1) the problem of ascription, (2) the link between consciousness and physical predicates, and (3) Strawson’s Person-monist solution. The common mistake is to treat the mind–body relation as a purely metaphysical puzzle and ignore the grammatical or logical grammar dimension that Strawson foregrounds.

Model answer

Introduction
States of consciousness are ascribed to entities because we treat those entities as subjects of experience capable of intentionality and qualia. We ascribe physical properties to the same entities because we predicate size, shape, location, and causal roles of the very same objects that we treat as conscious agents. Peter Strawson’s Individuals answers both questions by shifting from a substance-dualist picture to a Person-monist account grounded in the logical grammar of our ordinary discourse.

Body

• Why ascribe consciousness at all? Strawson argues that the ascription of consciousness is a necessary condition for the possibility of self-ascription. Only beings who can use “I” and refer to themselves as subjects of experience can intelligibly ascribe mental states to themselves; hence the ascription of consciousness is parasitic on the ascription of subjectivity.
• Why ascribe both consciousness and physical properties to the same thing? Strawson rejects Cartesian dualism because it posits two distinct substances. Instead, he treats persons as basic particulars that are both subjects of experience and possessors of physical properties. The same entity that is a locus of consciousness is also a spatio-temporal object; hence we predicate both mental and physical properties of persons.
• Strawson’s answer in Individuals Strawson’s solution is a form of descriptive metaphysics: he describes the actual structure of our ordinary person-concepts. Persons are basic particulars whose identity conditions are neither purely mental nor purely physical but irreducibly both. This avoids the ontological extravagance of dualism while preserving the phenomenological data that motivate it.

Conclusion
Strawson dissolves the traditional mind–body problem by redescribing persons as the fundamental ontological category that already carries both mental and physical predicates. This move preserves the data of consciousness without invoking immaterial substances, thereby aligning metaphysics with the grammar of our everyday discourse.

Q4. (a) "Wittgenstein's difficulty about not being able to say anything within a given language about the structure of that language can be met by the idea of a hierarchy of languages." Do you agree with this statement? Give reasons and justifications for your answer. (b) Analyze and discuss the different ways in which Kant and Hegel conceived the relationship between reality and our thinking about reality. (c) How did the logical positivists try to make philosophy a handmaid to science and establish a unified language of science? Why did their project fail? Discuss. (15 marks)

How to approach this question

The directive word “Discuss” asks for a balanced evaluation, not mere description. Examine each part separately: (a) assess Wittgenstein’s language-structure dilemma and the hierarchy-of-languages solution; (b) contrast Kant’s epistemological dualism with Hegel’s dialectical monism; (c) outline the logical positivists’ reductionist programme and its collapse. The common mistake is to treat the three parts as isolated; instead, show how the same meta-question—about language, knowledge, and verification—links them.

Model answer

Wittgenstein’s dilemma and the hierarchy-of-languages response

Wittgenstein’s Tractatus holds that a proposition cannot picture its own logical form; hence language cannot describe its own structure from within. This generates a self-referential paradox: any attempt to state the general form of propositions would itself be a proposition and therefore fall under the very form it seeks to describe. One rejoinder is Tarski’s hierarchy of object-language and meta-language: to talk about the structure of a language L, we ascend to a meta-language M₁; to talk about M₁ we ascend to M₂, and so on. This avoids contradiction by preventing the language from talking about itself at the same level. Critics object that the hierarchy is either arbitrary or infinite, leaving no final vantage point from which to survey language as a whole. Yet the move preserves clarity and prevents paradox, aligning with the later Wittgenstein’s therapeutic aim of dissolving rather than solving pseudo-problems.

Kant versus Hegel on reality and thought

For Kant, reality is two-tiered: noumenon (thing-in-itself) remains unknowable; phenomenon is structured by the a priori forms of sensibility (space, time) and understanding (categories). Thought conforms to objects only in so far as objects conform to the structures of cognition—hence a dualism between mind and world. Hegel rejects this dualism: reality is Geist in self-development; thought and being are moments of a single dialectical process. The dialectic moves from abstract identity to concrete negation and synthesis, so that what we think is progressively revealed as what is real. Whereas Kant’s epistemology is static and critical, Hegel’s is historical and speculative, making thought the engine of reality rather than its mirror.

The logical positivists’ programme and its failure

The Vienna Circle aimed to reduce all meaningful statements to those verifiable by observation, thereby making philosophy a “handmaid” to empirical science. They proposed a unified language of science in which theoretical terms were to be linked via explicit operational definitions to observation terms. The project failed for three reasons: (i) theoretical terms often outrun operational definitions (e.g., electron, gene); (ii) observation itself is theory-laden, so the observation-language boundary is porous; (iii) mathematics and logic, indispensable to science, are not reducible to empirical content. Popper’s falsificationism and Kuhn’s paradigm theory later showed that scientific language is pluralistic and historically contingent, not the single, transparent calculus envisaged by the positivists.

Conclusion

Wittgenstein’s hierarchy offers a coherent way to speak about language’s structure without self-reference; Kant’s dualism and Hegel’s monism map two fundamentally different architectures of mind-world relations; and the positivists’ failure teaches that philosophy’s role is not to serve science as a technician but to interrogate its conceptual foundations. Each episode illustrates how philosophical problems arise at the limit of language, thought, and verification—and how proposed solutions themselves become part of the ongoing discourse.

Q5. Answer the following questions in about 150 words each : 10×5=50 (a) According to Nyāya view of inference (Anumāna), what are the characteristics that ascertain the validity of inferential sign (Hetu)? Discuss. (b) How does the Buddhist theory of momentariness problematize the issue of human action and responsibility? Critically discuss. (c) Is *Puruṣa* one or many? Explain and examine the Sāṃkhya position in this context. (d) Critically explain the nature of *Samavāya* (inherence) as propounded in Vaiśeṣika philosophy. (e) Explain, as per Yoga philosophy, the nature of *Samādhi* with special reference to the difference between *Samprajñāta Samādhi* and *Asamprajñāta Samādhi*. (15 marks)

How to approach this question

The directive word is “problematize”, so the examiner wants a clear statement of the tension between Buddhist momentariness and moral responsibility, followed by a critical examination of the Buddhist resolution. A top answer must: (1) articulate the problem created by Kṣaṇabhaṅgavāda, (2) explain how pratītyasamutpāda restores responsibility, and (3) weigh strengths and weaknesses. The common mistake is to lapse into a purely descriptive account without critical engagement or to ignore the contrast with other Indian theories of karma.

Model answer

The Buddhist theory of momentariness (Kṣaṇabhaṅgavāda) asserts that every dharma—including mental and physical events—exists for a single indivisible moment and then perishes. This ontological claim immediately problematizes human action and responsibility: if the agent at the time of volition is numerically distinct from the experiencer of consequences, how can the latter be held accountable for the former’s deed?

Buddhism resolves this tension through the doctrine of pratītyasamutpāda (dependent origination). Actions and their effects are linked by a continuous causal chain in which each momentary state conditions the next. Although no permanent self persists, the sequence of causes and conditions ensures that morally relevant actions reverberate through subsequent moments. For example, a momentary volition to give alms conditions the arising of a subsequent momentary state of contentment; the continuity of this causal thread preserves moral accountability without positing an enduring soul.

Critically, the resolution has both strengths and weaknesses. On the positive side, it avoids the metaphysical baggage of an eternal ātman while still grounding responsibility in observable causal continuity. On the negative side, critics argue that the exact mechanism of continuity remains under-specified—how can a chain of discrete, causally isolated moments genuinely transmit moral weight? Furthermore, the account risks determinism, since every volition is itself conditioned by prior causes, potentially undermining genuine agency.

In contrast to Hindu karma theories that rely on a permanent self and to Jain theories that emphasize austerity, Buddhism’s pratītyasamutpāda offers a middle path: responsibility is real but non-substantial, anchored in the impersonal flow of causes rather than in any enduring entity.

Q6. (a) "A mango tree is grown out of a mango seed." How do the Sāṃkhya philosophers explain this process through their theory of causation by rejecting their rival perspectives? (b) Explain the basic characteristics of Sri Aurobindo's Integral Yoga for the realization of supramental consciousness through triple transformation. (c) Bring out the main points of contestation between Naiyāyikas and Prabhākara Mīmāṃsakas with reference to knowledge through words (Śābdabodha). (15 marks)

How to approach this question

The directive word “explain” demands a structured exposition of three distinct philosophical positions. Examiners test (a) grasp of Sāṃkhya causation and its rivals, (b) comprehension of Aurobindo’s Integral Yoga and its triple transformation, and (c) analytic clarity on the Mīmāṃsā debate over Śābdabodha. A top answer must: (1) state the theory briefly, (2) contrast it with rival views using precise examples or authorities, and (3) conclude with the significance of the position. The common mistake is to lapse into mere description without critical comparison or to ignore textual references.

Model answer

a. Sāṃkhya causation (Parināma Vāda) and rejection of rivals:

Sāṃkhya holds that the effect pre-exists in the cause in an unmanifest form (satkāryavāda), illustrated by the mango tree latent in the mango seed. This rejects two rival theories: (i) Asatkāryavāda (Nyāya-Vaiśeṣika), which claims effects arise from non-existence; and (ii) Arthāpatti (Mīmāṃsā), which posits inferential postulation. Sāṃkhya argues that specific effects require specific material causes (e.g., a mango seed yields only a mango tree), and that the effect cannot be produced from absolute non-existence, thereby preserving causal specificity.

b. Sri Aurobindo’s Integral Yoga and triple transformation:

Aurobindo’s Integral Yoga aims at realizing supramental consciousness through a three-stage transformation. First, psychic transformation purifies the ego and aligns desires with the inner psychic being. Second, spiritual transformation expands consciousness upward toward the divine and outward into the world. Third, supramental transformation actualizes the supermind, transmuting the individual and the cosmos. Unlike traditional yoga that seeks liberation from the world, Aurobindo’s path transforms the world itself by manifesting truth-consciousness in life.

c. Contestations between Naiyāyikas and Prabhākara Mīmāṃsakas on Śābdabodha:

The Naiyāyikas defend akhaṇḍa-pakṣa (whole-sentence meaning) via anvitābhidhāna, arguing that words derive meaning only when connected in a sentence. Prabhākara Mīmāṃsakas counter with śloka-pakṣa, holding that words possess independent meaning (śabda-bodha) and sentence meaning is a subsequent synthesis. The debate hinges on whether meaning is primarily compositional (Nyāya) or primarily lexical (Prabhākara), influencing hermeneutics and ritual exegesis in Mīmāṃsā.

Conclusion: These three expositions reveal how classical Indian philosophy systematically refines concepts of causation, spiritual practice, and linguistic meaning, each position sharpened through rigorous critique of rivals.

Q7. (a) Critically explain the arguments presented by the Akhyātivādins for explaining erroneous cognition. Evaluate the arguments against Akhyātivādins by the Anyathākhyātivādins. (b) Explain the meaning of seven steps of judgement (*Saptabhaṅginaya*) and its application in Jaina's *Syādvāda* for advocating a philosophy of non-absolutism (*Anekāntavāda*). (c) Do you agree with Nimbārka's explanation of the nature of God, Souls and Matter? Justify your answer. (15 marks)

How to approach this question

The directive word “Critically explain… Evaluate… Explain… Do you agree… Justify” signals that the examiner wants a multi-layered argument: (1) exposition of the school’s thesis, (2) internal critique of that thesis, and (3) comparative or counter-argument from another school. The one mistake most aspirants make is to treat Akhyātivādins, Anyathākhyātivādins, Jainas and Nimbārka as isolated topics; instead, weave them into a single dialectical narrative. Use Nyāya examples (e.g., the rope-snake illusion) and Jaina cases (e.g., the “living” vs. “non-living” predicates) to anchor abstract claims in concrete cases.

Model answer

Introduction
Philosophy in India begins with the problem of error: how can cognition be veridical yet sometimes wrong? Akhyātivādins (the “non-difference” school) argue that erroneous cognition arises from a single cognition that is both true and false; Anyathākhyātivādins counter that the error is not in the cognition itself but in its misapplication. Jaina Syādvāda extends this logic to seven-valued predication, while Nimbārka synthesizes a triune ontology of God, souls and matter. Below, we reconstruct each argument, weigh objections, and assess the contemporary relevance of these classical debates.

Akhyātivāda vs. Anyathākhyātivāda

• Akhyātivādin thesis: Error is a single cognition that simultaneously presents the object as it is and as it is not (e.g., mistaking a rope for a snake). The cognition is akhyāti—“non-difference”—because the locus of error is not the cognition but the object’s unfamiliar appearance.
• Nyāya objection: If the cognition is both true and false, it collapses into contradiction. Anyathākhyātivādins therefore argue that error is anyathā-khyāti—a cognition that misapplies a property to the wrong object (e.g., seeing silver where there is only mother-of-pearl). The mistake lies in the ascription, not the cognition itself.
• Empirical anchor: In cognitive psychology, this mirrors the “categorization error” paradigm; Akhyātivāda aligns with signal-detection theory (signal + noise), while Anyathākhyātivāda maps onto Bayesian mis-updating of priors.

Jaina Syādvāda and Saptabhaṅginaya

The seven-step judgement (saptabhaṅginaya) formalizes non-absolutism (anekāntavāda). Each step predicates a property conditionally:

1. Syād asti—“in some respects it is”;
2. Syān nāsti—“in some respects it is not”;
3. Syād asti ca nāsti ca—“in some respects it is and is not”;
4. Syād avaktavyah—“in some respects it is indescribable”;
5. Syād asti avaktavyah ca—“in some respects it is and is indescribable”;
6. Syān nāsti avaktavyah ca—“in some respects it is not and is indescribable”;
7. Syād asti nāsti avaktavyah ca—“in some respects it is, is not, and is indescribable.”

Applied to ethics, this prevents absolutist claims (e.g., “capital punishment is always just” vs. “never just”) and aligns with modern pluralistic governance models such as deliberative democracy.

Nimbārka’s Triune Ontology

Nimbārka’s Dvaitādvaita posits three eternal realities: Brahman (God), jīva (souls) and jada (matter). God is the controller (niyanta), souls are co-eternal participants, and matter is the instrument. This synthesis avoids both monism (Śaṅkara) and radical dualism (Madhva). In contemporary theology, the model accommodates both divine sovereignty and human agency, offering a via media between Calvinism and Pelagianism.

Conclusion
Classical Indian epistemology and metaphysics remain fertile ground for addressing modern cognitive science, ethics and theology. While Akhyātivāda’s paradox invites revision, Anyathākhyātivāda’s pragmatic account of error aligns with empirical psychology. Jaina saptabhaṅginaya provides a formal language for pluralism, and Nimbārka’s ontology supplies a robust framework for integrating transcendence and immanence. The enduring lesson is that philosophy’s first task is not to eliminate error but to map its contours with precision and humility.

Q8. (a) Present an account of Upamāna as an instrument of knowledge (Pramāṇa). How is Nyāya view of Upamāna different from Mīmāṃsā view? Discuss. (b) Critically explain Rāmānuja's conception of Brahman with special reference to the difficulties in explaining the relation of Brahman to Spirit (*Cit*) and Matter (*Acit*). (c) Why does the Dualistic School of Vedānta consider that differences (*Bhedas*) have separate existence and constitute the unique nature of things? Answer with reference to the theory of five-fold difference (*Pañcavidhabheda*). SB27—636 (15 marks)

How to approach this question

The directive word “Present… How is… different… Discuss” signals that the examiner wants a structured comparison of two pramāṇa theories (Nyāya vs Mīmāṃsā) and a critical explanation of a metaphysical system (Rāmānuja) plus a doctrinal justification (Dualistic Vedānta). A top answer must (1) define Upamāna as a pramāna, (2) contrast Nyāya’s causal-genetic account with Mīmāṃsā’s inferential-hermeneutic account, (3) expound Rāmānuja’s Brahman as saguṇa and address the cit–acit relation, and (4) justify the five-fold difference (pañcavidhabheda) as ontologically real. The common mistake is to treat Upamāna merely as analogy; instead it is a distinct pramāṇa of recognition.

Model answer

Upamāna is the pramāṇa by which we know an unknown object through its similarity to a known object. Nyāya holds that Upamāna arises from a prior sāmānyalakṣaṇa perception of universal concomitance (e.g., smoke–fire), so recognition of a new hill-smoke yields knowledge of “this is fire.” Mīmāṃsā, however, treats Upamāna as an inferential extension of śabda pramāṇa: linguistic instruction (“cow” uttered in presence of a buffalo) generates recognition via prior semantic convention, not causal concomitance.

Rāmānuja’s Brahman is saguṇa—qualified by attributes—and possesses three inseparable constituents: Cit (sentient souls), Acit (insentient matter), and Īśvara (the controlling whole). The difficulty lies in explaining how Brahman relates to Cit and Acit without collapsing into either monism or dualism. Rāmānuja solves this by the doctrine of brahman–jīva–jagat as real modes (pariṇāma) of Brahman, yet preserving their distinct natures: souls remain eternally distinct agents, matter remains inert yet organically dependent.

Dualistic Vedānta’s five-fold difference (pañcavidhabheda) asserts that difference is not illusory but real and irreducible. The five differences are: (1) between souls, (2) between soul and matter, (3) between matter and matter, (4) between soul and Brahman, and (5) between matter and Brahman. These differences constitute the unique nature (svarūpa) of each entity; without them, the identity of individuals would collapse. Thus, Dualism rejects Advaita’s māyā and Viśiṣṭādvaita’s pariṇāma, insisting that bhedas are eternally established relations, grounding both moral responsibility and cosmic order.

Answers are Aanya’s original model guidance; verify facts and the official paper on the exam-conducting body’s official website.

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