Knowledge and Knowability

Knowledge (6-Volume): Epistemic Foundations

What Is Knowledge? A Historical and Philosophical Analysis of Human Understanding

Knowledge is among the oldest, most contested, and most influential concepts in human civilization. Every society, whether ancient or modern, has depended upon some understanding of what it means to know something, how knowledge is acquired, who possesses it, how it should be transmitted, and what benefits or dangers it brings. Unlike physical objects that can be measured directly, knowledge exists at the intersection of mind, experience, memory, language, reason, culture, and reality. It is both a personal possession and a collective inheritance. Entire civilizations have risen upon systems of knowledge, and many have declined when their knowledge systems became rigid, dogmatic, or disconnected from changing circumstances.

At its simplest, knowledge may be described as the awareness and understanding of facts, truths, principles, or information acquired through experience, education, observation, reflection, or reasoning. Yet this deceptively simple definition conceals immense complexity. Knowledge is not merely a collection of isolated facts. A telephone directory contains information, but few would call it knowledge. Knowledge implies the recognition of relationships among facts, the ability to interpret them, and the capacity to use them meaningfully. It represents organized understanding rather than mere accumulation.

The English word “knowledge” derives from Old English cnāwleċe, related to the verb “to know.” Similar concepts appear across civilizations. The Sanskrit term Jnana, the Greek Episteme, the Arabic Ilm, the Latin Scientia, and the Chinese Zhishi all refer to forms of understanding, though each carries distinct philosophical implications. These traditions reveal that humanity has never possessed a single universal concept of knowledge. Rather, different cultures have emphasized different dimensions of knowing.

The issue of knowability lies at the heart of every discussion about knowledge. Knowability concerns whether reality can truly be known and, if so, to what extent. Can human beings know the world as it actually is, or only as it appears through the limitations of perception and cognition? This question has occupied thinkers for more than two millennia.

In ancient Athens during the fifth century BCE, Socrates became famous for declaring that he knew only one thing: that he knew nothing. This statement was not an admission of ignorance but a recognition of the limits of certainty. His student Plato, writing around 380 BCE in the dialogue Theaetetus, proposed one of the most influential definitions in intellectual history: knowledge as justified true belief. According to this formulation, a person knows something if the belief is true, if the person believes it, and if the belief is justified through evidence or reasoning.

For centuries this definition dominated Western philosophy. Yet debates continued. In Athens, Plato’s student Aristotle developed a more systematic approach, distinguishing different forms of knowledge. He identified episteme (scientific knowledge), techne (practical skill), and phronesis (practical wisdom). This distinction remains influential because it recognizes that knowing facts differs from knowing how to act wisely.

Knowledge is closely related to information, but the two are not identical. Information consists of data, statements, or symbols that describe reality. Knowledge arises when information is understood, interpreted, connected, and applied. A weather forecast reporting rainfall is information. Knowing whether to plant crops, postpone travel, or construct flood defenses on the basis of that information represents knowledge.

Modern information theory emerged in the twentieth century through the work of mathematicians such as Claude Shannon at Bell Laboratories in New Jersey during the 1940s. Shannon demonstrated how information could be measured mathematically. Yet even Shannon emphasized that information and meaning are distinct. Knowledge involves meaning, interpretation, and purpose.

Philosophers often describe this distinction through the concept of intentionality. Knowledge is information directed toward an object, purpose, or understanding. It is not merely stored data but meaningful awareness.

The systematic study of knowledge is known as epistemology, derived from the Greek words episteme (knowledge) and logos (study). Epistemology investigates what knowledge is, how it is acquired, what justifies belief, and whether certainty is possible. It has become one of the central branches of philosophy.

Throughout history, human beings have sought knowledge through multiple pathways. One traditional source is authority. Ancient societies often regarded knowledge as originating from kings, priests, prophets, elders, or sacred texts. In Mesopotamia, around 3000 BCE, scribes preserved knowledge in cuneiform tablets. In Egypt, priestly classes guarded astronomical and mathematical knowledge. In many cultures, authority functioned as a repository of accumulated wisdom.

Religious traditions have frequently emphasized revealed knowledge. In the Hebrew, Christian, and Islamic traditions, divine revelation has been regarded as a source of truths inaccessible through ordinary human reasoning alone. The relationship between revelation and reason became one of the most significant intellectual controversies in world history.

In Hippo Regius in North Africa during the late fourth and early fifth centuries CE, Augustine of Hippo argued that human knowledge ultimately depends upon divine illumination. For Augustine, reason was valuable but incomplete without spiritual insight.

During the Islamic Golden Age, scholars debated similar questions. The Mutazilite school, flourishing in Baghdad during the eighth and ninth centuries, emphasized rational inquiry and human reason. Later, thinkers associated with the Asharite tradition criticized aspects of Greek rationalism and emphasized divine omnipotence. The philosopher Ibn Sina attempted to reconcile Aristotelian philosophy with Islamic theology, while Al-Ghazali challenged certain philosophical assumptions regarding causality and certainty.

In medieval Europe, Thomas Aquinas, working in Paris and Naples during the thirteenth century, sought to harmonize Christian theology with Aristotelian philosophy. His synthesis became foundational within Roman Catholic intellectual tradition.

A second major source of knowledge is experience. Knowledge derived from observation, sensation, and interaction with the world forms the basis of empiricism. Ancient physicians, farmers, sailors, and artisans accumulated practical knowledge through repeated encounters with reality.

The philosophical defense of empiricism reached new heights in seventeenth-century Europe. In London, John Locke argued in 1689 that the human mind begins as a tabula rasa or blank slate, acquiring knowledge through experience. Later thinkers such as George Berkeley and David Hume expanded empirical approaches while raising profound questions about causation, certainty, and perception.

Observation alone, however, is not infallible. Human senses are vulnerable to illusion. Optical illusions can deceive vision. Auditory illusions can mislead hearing. Memory can distort events. Therefore, experience generates knowledge, but not always certainty.

A third pathway to knowledge is reason. Rationalists such as René Descartes argued during the seventeenth century that certain truths can be known through reasoning independent of sensory experience. Descartes’ famous declaration, Cogito, ergo sum (“I think, therefore I am”), sought a foundation of certainty immune to sensory deception.

Knowledge acquired through reasoning often becomes inferential knowledge. Inferential knowledge is derived from conclusions drawn from other facts or theories. Much of modern science depends upon inference. No individual has directly observed an electron with unaided senses, yet knowledge of electrons arises from experimental evidence and theoretical reasoning.

This distinction between factual knowledge and inferential knowledge remains crucial. Factual knowledge arises from direct observation. Inferential knowledge emerges through interpretation and reasoning. Most advanced scientific knowledge—including knowledge of atoms, black holes, plate tectonics, and evolutionary history—is inferential.

Another influential distinction is that between knowing that and knowing how. The philosopher Gilbert Ryle emphasized this difference in the twentieth century. A person may know that the front crawl is the fastest swimming stroke yet be unable to swim. Conversely, an experienced swimmer may know how to swim without understanding hydrodynamics. These represent different forms of knowledge.

The distinction has practical significance. Universities often prioritize theoretical knowledge, whereas apprenticeships, crafts, and professions frequently emphasize procedural knowledge. Surgeons, pilots, engineers, musicians, and athletes require both forms.

Questions concerning justification occupy the center of modern epistemology. How do we know that our beliefs are true? Why should one belief count as knowledge while another remains opinion?

The traditional answer emphasized justification. A belief becomes knowledge when supported by adequate reasons or evidence. Yet in 1963, the American philosopher Edmund Gettier published a brief paper that transformed epistemology. Gettier presented examples in which a person possessed justified true belief yet intuitively lacked knowledge. These examples became known as the Gettier Problem.

The Gettier challenge generated thousands of scholarly articles. Philosophers proposed additional requirements beyond justified true belief. Some developed externalist theories, arguing that knowledge depends not merely upon internal justification but upon reliable causal connections between beliefs and reality.

The debate remains unresolved, illustrating how difficult it is to define knowledge precisely.

The possibility of knowledge has also been challenged by skepticism. Philosophical skeptics question whether certainty is achievable. Ancient skepticism emerged in Greece through thinkers such as Pyrrho of Elis around 300 BCE. Pyrrhonian skeptics argued that because every claim can be challenged, suspension of judgment is often appropriate.

Modern skepticism acquired new force through Descartes’ thought experiments. If dreams can resemble waking life, how can one know that one is awake? If a deceptive power manipulated perceptions, could certainty survive?

Although few philosophers embrace absolute skepticism, skeptical arguments continue to shape debates concerning knowledge, evidence, and certainty.

The Austrian philosopher Ludwig Wittgenstein addressed these issues in On Certainty, written between 1950 and 1951 in Cambridge. Wittgenstein argued that doubt itself presupposes certain unquestioned foundations. Before doubting everything, one must already trust language, memory, and experience to some degree.

The branches of human knowledge have expanded enormously over time. Ancient classifications often divided knowledge into theology, philosophy, medicine, law, and practical arts. By the nineteenth and twentieth centuries, specialization produced hundreds of disciplines.

Today, major branches include natural sciences, social sciences, formal sciences, humanities, technology, medicine, law, economics, religious studies, and artistic knowledge. Each possesses distinctive methods, standards of evidence, and forms of expertise.

This diversity raises an important question: who qualifies as a knowledgeable person?

Political authority does not necessarily confer knowledge. A Pope, President, Prime Minister, IMF Director, WTO official, or World Bank President may possess extensive expertise in specific domains, yet their positions alone do not make them universally knowledgeable. Leadership often requires administrative, diplomatic, or political skills rather than comprehensive understanding.

Similarly, intellectual prestige does not guarantee universal knowledge. A Nobel Laureate may possess extraordinary expertise within a narrow field while remaining uninformed about others. Modern knowledge has become so specialized that no individual can master all disciplines.

Religious and spiritual traditions propose alternative models of knowledge. In India, Vedantic philosophers, Yoga Gurus, and Sannyasins often distinguish intellectual knowledge from self-knowledge. The teachings attributed to Gautama Buddha in northern India during the fifth century BCE emphasized direct insight into suffering and consciousness. The teachings associated with Jesus Christ in first-century Judea focused on spiritual understanding and ethical transformation. Prophet Muhammad in seventh-century Arabia emphasized knowledge as both spiritual obligation and practical responsibility.

Likewise, Adi Shankaracharya in eighth-century India argued that ultimate knowledge consists of realizing the identity of Atman and Brahman. Such traditions define knowledge in existential and spiritual terms rather than merely intellectual ones.

Modern thinkers offer additional perspectives. Karl Marx viewed knowledge through historical and social structures. Carl Jung explored unconscious dimensions of knowledge embedded within symbols, myths, and archetypes.

How, then, does one become knowledgeable?

Different traditions provide different answers. Some emphasize divine grace. Others stress disciplined study. Confucian traditions emphasize education and moral cultivation. Buddhist traditions emphasize meditation and insight. Scientific traditions emphasize observation, experimentation, and critical thinking. Universities emphasize systematic learning and research.

Institutions such as Harvard University, University of Oxford, University of Cambridge, and Massachusetts Institute of Technology provide access to advanced knowledge, but attendance alone does not guarantee wisdom. Equally, sitting before a guru, reading scriptures, or engaging in self-study does not automatically produce understanding.

Historically, many traditions have emphasized a combination of study, reflection, dialogue, and experience. The Indian concept of Shravana (hearing), Manana (reflection), and Nididhyasana (deep contemplation) represents one such model. Socratic dialogue represents another. Scientific investigation represents yet another.

Controversy itself may contribute to knowledge. The Indian tradition of Shastrartha, formal philosophical debate, regarded disagreement as a path toward truth. Similarly, Georg Wilhelm Friedrich Hegel proposed that knowledge advances through dialectical conflict between opposing ideas. Immanuel Kant sought to examine the limits and capacities of human reason in his Critique of Pure Reason (1781).

The Nasadiya Sukta of the Rigveda, composed perhaps between 1500 and 1200 BCE in the Indian subcontinent, remains remarkable for its intellectual humility. Its final verses question whether even the creator knows how existence began. Few texts in world history express uncertainty with such honesty.

The benefits of knowledge are equally diverse. Knowledge may or may not generate wealth, political power, technological innovation, social influence, personal fulfillment, or spiritual liberation. But in someway Scientific knowledge transformed medicine and industry. Economic knowledge influences markets. Legal knowledge shapes institutions. Spiritual knowledge may provide inner peace.

Yet knowledge also has limitations. Human brains possess finite memory, attention, and computational capacity. The volume of published scientific literature alone exceeds what any individual could read in a lifetime. Furthermore, knowledge is always partial, provisional, and situated within particular historical contexts.

A paradox therefore emerges. If one claims complete knowledge, one risks arrogance and dogmatism. If one claims complete ignorance, one abandons the pursuit of understanding. The challenge lies between these extremes.

The truly knowledgeable person may not be the individual who claims certainty, nor the one who rejects all possibility of knowledge. Rather, it may be the individual who combines curiosity with discipline, confidence with humility, skepticism with openness, and learning with ethical responsibility.

Knowledge vs servitude

A more radical and controversial perspective argues that the ultimate test of a knowledgeable person is not what they know, write, teach, discover, or preach, but whether they continue to seek power, wealth, security, status, or employment from others. According to this view, genuine knowledge should produce a degree of intellectual and existential self-sufficiency. If a person claims profound knowledge yet remains dependent upon institutions, rulers, employers, markets, patrons, or followers for validation and survival, one may ask whether that knowledge has truly liberated them or merely furnished a more sophisticated form of dependence.

From this standpoint, knowledge and servitude appear fundamentally opposed. The servant seeks protection, reward, promotion, recognition, or material security from an external authority. The knower, by contrast, is presumed to have discovered something sufficient in itself, something that frees the mind from compulsive dependence upon external approval and possession. If knowledge is genuinely transformative, why should its possessor continue to chase the same goals as those who openly admit ignorance? Why should one who claims to understand reality remain anxious about rank, salary, reputation, or institutional position?

This argument has appeared in various forms throughout history, from ancient ascetic traditions in India and Greece to religious mystics and philosophical skeptics. It suggests that the pursuit of employment, wealth, influence, or security may reveal an unresolved inner dependence inconsistent with claims of higher understanding. Under this interpretation, many celebrated intellectuals, religious authorities, political leaders, and even scholars may possess information, expertise, or technical skill, yet fall short of genuine knowledge because they remain bound by systems of obligation and reward.

Critics of this position respond that such a standard is unrealistically absolute. Human beings live within societies and must engage in economic, political, and social relationships. Knowledge may increase freedom without eliminating practical necessities. Nevertheless, the challenge remains philosophically significant: if knowledge is liberation, then every continuing form of servitude invites the question of whether the liberation is complete, partial, or merely imagined. In this sense, the tension between knowledge and servitude remains one of the most demanding tests by which claims of wisdom may be examined.

Knowledge Vs Intelligence

Another question that inevitably arises is whether knowledge and intelligence are identical or whether they represent fundamentally different dimensions of human cognition. In ordinary language the two terms are often used interchangeably, yet closer examination suggests important distinctions. A person may possess vast amounts of knowledge while displaying little originality, adaptability, or practical judgment. Conversely, an individual may demonstrate remarkable intelligence despite having limited formal education or access to accumulated knowledge. This suggests that knowledge and intelligence are related but not identical phenomena.

Knowledge may be understood as accumulated understanding, memory, experience, and insight regarding reality. Intelligence, by contrast, may be viewed as the capacity to process information, recognize patterns, solve problems, formulate strategies, and adapt to changing circumstances. In this sense, intelligence can be regarded as the functional or operational aspect of cognition, while knowledge constitutes its content. Knowledge provides the material; intelligence determines how effectively that material is used.

The distinction becomes especially important when examining the relationship between knowledge and servitude. If genuine knowledge leads toward freedom, independence, and self-sufficiency, intelligence does not necessarily do so. Intelligence is morally and philosophically neutral. It can be employed to liberate or to dominate. Throughout history, many systems of political, economic, religious, and military control have been constructed not primarily by the knowledgeable in the highest sense, but by the highly intelligent. The architect of an empire, a bureaucracy, a financial system, a propaganda apparatus, or a commercial monopoly may display extraordinary intelligence without possessing corresponding wisdom or self-knowledge.

From this perspective, the creators of servitude are often not the ignorant but the intelligent. Intelligence enables the organization of institutions, the manipulation of incentives, the management of populations, and the construction of structures through which others become dependent. The knowledgeable person seeks understanding; the intelligent person may seek effectiveness. The knowledgeable person questions the necessity of domination; the intelligent person may perfect its mechanisms. Knowledge asks, “What is true?” Intelligence asks, “What works?”

This distinction helps explain why societies frequently reward intelligence more than knowledge. Governments, armies, corporations, and religious institutions often require individuals capable of administration, persuasion, calculation, and strategic planning. Such abilities are manifestations of intelligence. Genuine knowledge, however, may challenge the very assumptions upon which these institutions rest. Consequently, history repeatedly presents a tension between the knowledgeable individual, who seeks truth and freedom, and the intelligent individual, who often excels at creating, maintaining, or expanding systems of order, authority, and dependence.

The distinction should not be exaggerated into an absolute opposition. The highest human achievements often require both knowledge and intelligence working together. Nevertheless, the difference remains significant. A society may be filled with intelligent people and yet remain poor in wisdom. It may possess sophisticated technologies, efficient institutions, and powerful organizations while lacking deeper understanding of freedom, purpose, and the human condition.

The question therefore remains open: is intelligence the servant of knowledge, or has knowledge too often become the servant of intelligence? The answer may determine whether human civilization advances toward greater freedom or toward increasingly refined forms of servitude.

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Sarvarthapedia Knowledge Network: Knowledge

Core Concept

Knowledge

Knowledge is the awareness, understanding, interpretation, and meaningful application of facts, truths, experiences, principles, and insights. It stands at the intersection of reality, perception, memory, language, reasoning, culture, and action.

Foundations of Knowledge

Knowability

The philosophical question of whether reality can be known and to what extent human beings can understand existence.

Truth

The correspondence between belief, statement, or understanding and reality.

Belief

Acceptance that something is true, whether or not sufficient evidence exists.

Understanding

The ability to grasp relationships, meanings, and implications beyond isolated facts.

Information

Structured data or communicated facts that may become knowledge through interpretation and application.

Epistemology and the Study of Knowledge

Epistemology

The philosophical study of the nature, origin, scope, and limits of knowledge.

Theory of Justification

The study of what makes beliefs rationally acceptable as knowledge.

Justified True Belief

Classical definition of knowledge associated with Plato.

Gettier Problem

A challenge showing that justified true belief may not always constitute knowledge.

Externalism

The view that factors outside a person’s awareness contribute to knowledge.

Sources of Knowledge

Experience

Knowledge acquired through interaction with the world.

Observation

Direct perception of events, objects, or phenomena.

Experiment

Controlled testing to verify claims and theories.

Authority

Knowledge accepted from recognized institutions, traditions, or individuals.

Revelation

Knowledge believed to originate from divine or transcendent sources.

Reason

The intellectual process of drawing conclusions from premises and evidence.

Forms of Knowledge

Propositional Knowledge

Knowledge expressed as statements about facts or truths.

Procedural Knowledge

Knowledge expressed through skills and actions.

Knowing That

Awareness that a proposition is true.

Knowing How

Practical ability to perform an action or task.

Tacit Knowledge

Knowledge difficult to articulate or formally describe.

Explicit Knowledge

Knowledge that can be documented, taught, and communicated.

Types of Knowledge

Empirical Knowledge

Knowledge acquired through observation and experience.

Rational Knowledge

Knowledge derived primarily through reasoning.

Inferential Knowledge

Knowledge derived from reasoning based on evidence or other knowledge.

Factual Knowledge

Knowledge based on direct observation and verified facts.

Theoretical Knowledge

Knowledge structured into explanatory systems and models.

Practical Knowledge

Knowledge applicable to real-world situations and decision-making.

Philosophical Traditions

Plato

Ancient Greek philosopher who developed the classical definition of knowledge.

Aristotle

Greek philosopher who distinguished different forms of knowledge.

Socrates

Philosopher known for questioning assumptions and emphasizing intellectual humility.

René Descartes

Founder of modern rationalism and methodological doubt.

John Locke

Empiricist philosopher emphasizing experience as the source of knowledge.

David Hume

Philosopher who challenged assumptions about causality and certainty.

Immanuel Kant

Philosopher who synthesized rationalism and empiricism.

Ludwig Wittgenstein

Philosopher who explored certainty and the foundations of knowledge.

Knowledge and Skepticism

Skepticism

The view that certainty is difficult or impossible to attain.

Philosophical Skepticism

Systematic questioning of whether knowledge is possible.

Scientific Skepticism

The practice of requiring evidence before accepting claims.

Certainty

Complete confidence in the truth of a proposition.

Knowledge and Religion

Theology

Systematic study of divine reality and religious belief.

Faith

Trust or belief independent of empirical proof.

St. Augustine

Christian thinker who integrated classical philosophy with theology.

Thomas Aquinas

Medieval philosopher who reconciled Aristotle and Christianity.

Ibn Sina

Islamic philosopher integrating reason and revelation.

Al-Ghazali

Islamic thinker who critiqued philosophical certainty.

Indian Perspectives on Knowledge

Jnana

Knowledge understood as realization, wisdom, and insight.

Vedanta

Philosophical tradition focused on ultimate reality and self-realization.

Adi Shankaracharya

Exponent of Advaita Vedanta.

Guru

Teacher guiding the transmission of knowledge and wisdom.

Shastrartha

Traditional Indian philosophical debate.

Nasadiya Sukta

Ancient Vedic hymn exploring uncertainty about existence.

Knowledge and Religious Traditions

Buddha

Teacher emphasizing experiential insight into reality.

Jesus Christ

Religious teacher emphasizing spiritual and ethical understanding.

Prophet Muhammad

Religious leader emphasizing learning and knowledge.

Mysticism

Direct experiential knowledge of transcendent reality.

Knowledge and Society

Education

Organized transmission of knowledge across generations.

Self-Study

Independent pursuit of knowledge.

University

Institution dedicated to advanced learning and research.

Expertise

Deep knowledge within a specific domain.

Knowledge and Power

Relationship between understanding, influence, and authority.

Leadership

Exercise of authority within institutions and societies.

Nobel Laureate

Individual recognized for exceptional contributions to knowledge.

Pope

Religious authority in the Roman Catholic tradition.

President

Political leader responsible for governance.

Knowledge and Science

Science

Systematic investigation of reality through observation and testing.

Scientific Method

Structured approach for acquiring reliable knowledge.

Evidence

Information supporting or challenging a claim.

Knowledge and Mind

Consciousness

Awareness of self and surroundings.

Memory

Capacity to store and retrieve knowledge.

Cognition

Mental processes involved in acquiring knowledge.

Intuition

Immediate understanding without explicit reasoning.

Knowledge and Wisdom

Wisdom

Judicious application of knowledge to life and action.

Practical Wisdom

Ability to make sound decisions in complex situations.

Nirvana

Liberation through profound understanding in Buddhism.

Limits of Knowledge

Human Cognitive Limits

Constraints imposed by memory, perception, and reasoning.

Uncertainty

Recognition that knowledge may be incomplete or provisional.

Ignorance

Absence or limitation of knowledge.

Unknown

Reality not yet understood or discovered.

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Sarvarthapedia Knowledge Network: Knowledge

Core Concept

Knowledge

See also

Foundations of Knowledge

Knowability

See also

Truth

See also

Belief

See also

Understanding

See also

Information

See also

Epistemology and the Study of Knowledge

Epistemology

See also

Theory of Justification

See also

Justified True Belief

See also

Gettier Problem

See also

Externalism

See also

Sources of Knowledge

Experience

See also

Observation

See also

Experiment

See also

Authority

See also

Revelation

See also

Reason

See also

Forms of Knowledge

Propositional Knowledge

See also

Procedural Knowledge

See also

Knowing That

See also

Knowing How

See also

Tacit Knowledge

See also

Explicit Knowledge

See also

Types of Knowledge

Empirical Knowledge

See also

Rational Knowledge

See also

Inferential Knowledge

See also

Factual Knowledge

See also

Theoretical Knowledge

See also

Practical Knowledge

See also

Philosophical Traditions

Plato

See also

Aristotle

See also

Socrates

See also

René Descartes

See also

John Locke

See also

David Hume