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 is “Do you agree,” so the examiner is testing your capacity to weigh arguments, not merely describe them. A top answer must (1) state whether you agree and with what nuance, (2) explain Wittgenstein’s difficulty and the hierarchy-of-languages response, and (3) give reasons—ideally linking to Tarski or Russell and a concrete example. The mistake most aspirants make is to treat the hierarchy as a knockdown solution without acknowledging its own meta-language regress.

Model answer

Wittgenstein’s early view in the Tractatus is that meaningful propositions picture states of affairs in a single, exhaustive language; hence the structure of that language cannot itself be stated within the language. This generates a self-referential paradox: any attempt to describe the language’s syntax or limits would itself be a proposition inside the language, violating the very limit it seeks to describe. The hierarchy-of-languages idea—developed by Tarski in his theory of truth—offers a way out by positing an ascending series of metalanguages: L0, L1, L2, … where Ln+1 can talk about the syntax and semantics of Ln without collapsing into it. Thus, when we want to discuss the structure of English, we ascend to a metalanguage (say, English augmented with quotation and semantic predicates) and speak about English from there. This preserves the Tractatus insight that the structure cannot be stated in the object-language while supplying the needed metalinguistic vocabulary.

Agreement is therefore conditional: the hierarchy does meet Wittgenstein’s difficulty, but only by relocating the problem rather than eliminating it. The regress objection remains—what guarantees the structure of the highest metalanguage?—and Tarski himself acknowledged that the hierarchy must be “anchored” in an informal metalanguage whose rules are not themselves formalized. Moreover, the Wittgenstein of the Philosophical Investigations abandons the ladder metaphor altogether, preferring language-games and forms-of-life that are neither fully formalizable nor in need of a single overarching metalanguage. Hence, while the hierarchy-of-languages proposal is a powerful technical response, it does not dissolve Wittgenstein’s original difficulty; it merely postpones it to a higher level of 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 “problematize” signals that you must first identify the tension the Buddhist theory of momentariness creates for human action and responsibility, then present the Buddhist resolution through causal continuity (pratītyasamutpāda). Examiners test your ability to (1) articulate the problem, (2) explain the resolution with textual references, and (3) offer a balanced critique. The common mistake is to stop at describing momentariness without linking it to responsibility or to ignore the role of pratītyasamutpāda.

Model answer

The Buddhist doctrine of momentariness (Kṣaṇabhaṅgavāda) asserts that every dharma—including the agent—is momentary; nothing endures beyond a single kṣaṇa. This ontological claim directly unsettles the notion of moral agency: the person who performs an action (say, a thief stealing at t1) is numerically distinct from the person who reaps the consequence (the thief being punished at t2), because both moments are discrete aggregates of ever-changing consciousness and form. Without a permanent self (ātman), the continuity of responsibility appears broken, threatening both retributive justice and ethical motivation.

Buddhism resolves this through the principle of causal continuity (pratītyasamutpāda), which posits that actions and their results are linked by a chain of dependent origination rather than by an enduring subject. Each momentary state (citta-caitta) conditions the next through causal conditions (hetu-phala), thereby preserving functional continuity without requiring a permanent substance. For example, the volition to give alms at moment t1 conditions the resultant merit at t2, even though the agent at t2 is a new aggregate; the causal nexus—not an enduring self—bears the moral burden.

Critically, the theory succeeds in safeguarding responsibility without invoking ātman, aligning with the Middle Way between eternalism and nihilism. Yet it faces objections: the exact mechanism of continuity remains debated—some argue it risks determinism, while others see it as overly abstract. In contrast, Hindu karma-systems preserve agency via a permanent soul, and Jaina ethics rely on the continuity of the jīva across lives, highlighting how Buddhist pratītyasamutpāda uniquely secures moral responsibility without substantial identity.

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 the three distinct philosophical frameworks, each with its own technical vocabulary and rival critiques. Examiners test: (1) conceptual clarity of the theory, (2) reasoned comparison with rival views, and (3) illustrative examples or textual references. The most common mistake is to merely describe the theory without engaging the rival perspective or without labeling the key technical terms, thereby losing precision marks.

Model answer

a. Sāṃkhya Theory of Causation (Parināma Vāda) in the mango-seed illustration

Sāṃkhya philosophers argue that the mango tree pre-exists in the mango seed in an unmanifest (avyakta) form, thereby rejecting Asatkāryavāda—the view that effects arise from non-existence. They hold that the effect must be contained in the cause; otherwise production would be a miracle, violating the principle of arthakriyāsāmarthya (capacity for effect). The seed’s specific material form (mango) conditions the specific effect (mango tree), not a banyan, thus rejecting Vivartavāda (illusionism) which would make the effect illusory. This Satkāryavāda is empirically anchored: clay’s potness is already in clay as form-potential, and the mango tree’s trunk, branches, and leaves are latent in the seed’s molecular and genetic structure.

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

Aurobindo’s Integral Yoga seeks supramental consciousness through a three-tiered transformation. First, Psychic Transformation refines the ego into a soul-center that aligns desires with truth; second, Spiritual Transformation expands consciousness upward to the divine and outward to the cosmos; third, Supramental Transformation actualizes the Gnosis that governs matter itself. Unlike classical yoga, which often aims at liberation from the world, Aurobindo insists that supramental realization must descend to reshape life and society, turning the Lila of existence into a divine play of truth-consciousness.

c. Contestations between Naiyāyikas and Prabhākara Mīmāṃsakas on Śābdabodha

The Naiyāyikas defend Anvitābhidhāna—meaning inheres in the sentence as a whole—so understanding a sentence like “cow is on the roof” requires grasping the relation between “cow” and “roof.” Prabhākara Mīmāṃsakas, by contrast, uphold Abhihitānvaya: individual words denote their meanings, and the mind combines them through akāṃkṣā (expectancy), yogyatā (compatibility), and tātparya (intention). The debate turns on whether sentence-meaning is a unitary act or a composite of word-meanings, a dispute that shapes hermeneutics in both ritual and ordinary language.

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’ asks for analytical depth: first, to reconstruct the Akhyātivādins’ arguments for erroneous cognition with textual fidelity; second, to evaluate their refutation by Anyathākhyātivādins using logical and epistemological criteria; and third, to demonstrate evaluative judgement. Examiners test (i) grasp of classical Indian epistemology, (ii) comparative analysis across schools, and (iii) capacity to weigh counter-arguments. The common mistake is to lapse into descriptive listing without critical engagement or to conflate the two schools’ positions, thereby losing evaluative precision.

Model answer

Introduction
Erroneous cognition (mithyājñāna) occupies a pivotal place in classical Indian epistemology, especially within Nyāya and Advaita traditions. The Akhyātivādins, primarily Advaita Vedāntins such as Prakāśātman and Citsukha, advance a theory of cognitional error that locates the mistake not in the object but in the superimposition (adhyāsa) of one cognition upon another. Anyathākhyātivādins, chiefly the Nyāya school led by Gangeśa Upādhyāya, counter by arguing that error arises from a misidentification of the object itself, thereby shifting the locus of error from superimposition to misapprehension.

Body
1. Akhyātivāda: Arguments for erroneous cognition
The Akhyātivādins contend that error stems from cognitive superimposition (adhyāsa), where the self erroneously attributes the properties of one object to another. They invoke the example of mistaking a rope for a snake: the cognition “this is a snake” is erroneous not because the object is misperceived as a non-existent entity, but because the perceiver superimposes the snake-ness upon the rope. This view preserves the reality of the object while explaining error as a cognitive distortion. Prakāśātman’s Pañcapādikā and Citsukha’s Tattva-Prakāśa formalize this as a case of abhāva (absence) being falsely cognized as bhāva (presence), thereby grounding error in the cognitive act rather than the object.

2. Anyathākhyātivāda: Refutation and alternative account
The Anyathākhyātivādins, particularly Gangeśa in Tattva-Cintāmaṇi, reject the superimposition thesis. They argue that error arises from a failure to correctly identify the object’s features, leading to a cognition that is anyathā (otherwise) than what is actually present. In the rope-snake example, the perceiver fails to distinguish the rope’s coiled form, resulting in a cognition that is “otherwise” than the rope. This account locates error in the cognitive process itself, not in superimposition, thereby prioritizing perceptual discrimination over metaphysical overlay. Gangeśa’s theory of anupalabdhi (non-apprehension) and vyabhicāri bhāvanā (erratic apprehension) provides a robust causal mechanism for error, grounded in sensory limitation rather than metaphysical confusion.

3. Comparative evaluation
The Akhyātivāda offers a metaphysically parsimonious account by preserving the reality of objects while explaining error as cognitive distortion. However, it risks collapsing into a form of idealism where the object’s nature is obscured by cognitive overlay. The Anyathākhyātivāda, by contrast, grounds error in perceptual limitation, aligning with empirical psychology and offering a more testable model of cognition. Yet, it struggles to explain cases where the object is entirely absent, such as hallucinations, where superimposition seems a more plausible explanation.

Conclusion
While both schools illuminate different facets of erroneous cognition, the Anyathākhyātivāda’s emphasis on perceptual discrimination and causal mechanisms provides a more empirically grounded account. However, the Akhyātivāda’s metaphysical insight into cognitive distortion remains valuable for understanding complex perceptual errors. A synthetic approach, acknowledging both perceptual limitation and cognitive overlay, may offer the most comprehensive theory of erroneous cognition in contemporary epistemology.

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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