A-level and IB · Humanities

IB Theory of Knowledge: core concepts

Theory of Knowledge flashcards on knowledge questions, the knowledge framework, the five areas of knowledge, optional themes, the exhibition and the essay.

36 cards5 topicsAbout 15 minutes a roundIB Diploma Programme Theory of Knowledge style content, comparable to a first-year university introduction to epistemology and critical thinking

Independent study material written by StudyBrix, not produced or reviewed by any exam board or by the International Baccalaureate Organization. Check your own specification or subject guide.

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About this deck

This deck is for IB Diploma students in Theory of Knowledge (TOK) and for anyone curious about how the course frames knowledge. It uses the vocabulary of the current TOK course, first assessed in 2022: the core theme of knowledge and the knower, five optional themes (students study two), five areas of knowledge (history, the human sciences, the natural sciences, mathematics and the arts), and the knowledge framework of scope, perspectives, methods and tools, and ethics. Older resources often talk about 'ways of knowing'; that structure belonged to the previous course and is not part of the current framework.

Assessment has two parts: an internally assessed exhibition and an externally assessed 1,600-word essay on a prescribed title. If you are comparing with A-level courses, specifications differ between exam boards (AQA, Edexcel, OCR), so readers should check theirs; TOK students should check the current guide and their school's deadlines.

No special background is needed. Study each card by writing your own example from a subject you take, then turning it into a knowledge question. Strong TOK work moves back and forth between specific real situations and general questions about knowledge.

Common mistakes: writing a subject question (about the topic) instead of a knowledge question (about how we know); listing examples without analysis; treating the areas of knowledge as if they never overlap; and ignoring counterclaims. In the essay, answer the prescribed title as set, without swapping it for an easier question.

Before you start: None formally; enrolment in IB Diploma courses helps, since examples should come from your own subjects.

All 36 cards

Cover the definitions with a sheet of paper and test yourself, or use the study modes above.

Core ideas

Knowledge question: An open, contestable question about knowledge itself (how it is produced, shared, justified or limited), phrased in general terms and using TOK concepts.Example: 'To what extent can a model that simplifies reality still give us reliable knowledge?'
Real-life situation: A specific, concrete case from the world, a subject or personal experience that raises an issue about knowledge.Example: A weather forecast that was wrong despite advanced models can prompt questions about prediction.
Knowledge claim: A statement asserting that something is true or known; first-order claims are within a field, second-order claims are about knowledge itself.Example: 'Water boils at 100 degrees C at sea level' is first-order; 'scientific knowledge is provisional' is second-order.
Knowledge and the knower: The compulsory core theme, which asks students to reflect on themselves as knowers and on the communities and perspectives that shape what they know.Example: How might growing up bilingual shape what you notice or take for granted?
Justification: The reasons or evidence offered to support a claim, which make believing it reasonable.Example: A historian justifies a date by agreement between independent primary sources.
Certainty: The degree to which a claim is beyond doubt; few areas outside mathematics claim complete confidence.Example: A proven theorem is held with much more confidence than a prediction in economics.
Objectivity: The aim of reaching knowledge that does not depend on individual feelings or interests, often pursued through shared methods and checking by others.Example: Double-blind trials reduce the influence of researchers' expectations.
Interpretation: Assigning meaning to evidence or a work; different knowers may interpret the same material differently.Example: Two critics read the same painting as political protest and as private grief.
Evidence: Information, observations or testimony used to support or challenge a claim; what counts as acceptable support differs between areas of knowledge.Example: A lab measurement, a court testimony and a historical letter are judged by different standards.
Truth: A central TOK concept with competing accounts: correspondence (matching reality), coherence (fitting with other beliefs) and pragmatic (working in practice).Example: A map can be true enough to navigate by even though it leaves out most details.
Expertise and trust: Much of what we know comes from relying on others with specialist knowledge, which raises questions about when such reliance is reasonable.Example: Most people accept that the Earth is about 4.5 billion years old without dating rocks themselves.
Confirmation bias: The tendency to seek, notice and remember information that supports what we already believe.Example: A fan remembers every match where the referee seemed unfair to their team.
Counterclaim: A claim that challenges or limits a main claim; good TOK writing evaluates it rather than ignoring it.Example: Claim: experts are reliable. Counterclaim: expert consensus has sometimes been overturned.

Knowledge framework

Scope: The framework element asking what a theme or area of knowledge covers, what problems it tries to solve and where its limits are.Example: Can the natural sciences answer questions about what makes a life meaningful?
Perspectives: The framework element exploring how different viewpoints, cultures and traditions shape knowledge within a theme or area.Example: Historians from two nations may describe the same war very differently.
Methods and tools: The framework element examining the procedures, instruments and practices used to produce knowledge in a theme or area.Example: Mathematics relies on proof from axioms; the human sciences rely on surveys, experiments and models.
Ethics: The framework element raising moral questions about producing, sharing and using knowledge.Example: Should researchers publish findings that could be used to cause harm?

Areas of knowledge

History as an area of knowledge: Knowledge about the past built from surviving evidence, selection and interpretation, open to revision as new sources and perspectives emerge.Example: Newly opened archives can change how historians judge a leader's decisions.
Human sciences: The study of human behaviour and societies (psychology, economics, sociology and similar), facing challenges because people are complex and react to being studied.Example: People may change their answers when they know they are being observed.
Natural sciences: Knowledge of the physical world gained through observation, experiment and testable theories that can be revised.Example: The shift from Newtonian mechanics to relativity refined, rather than erased, earlier knowledge.
Mathematics as an area of knowledge: Knowledge built through deductive proof from axioms and definitions, often seen as the most certain area yet raising questions about whether it is invented or discovered.Example: Changing the parallel postulate produces consistent non-Euclidean geometries.
The arts: Knowledge produced and shared through creative works, raising questions about intention, interpretation and whether art can convey truth.Example: A novel may give insight into war that statistics cannot.
Falsifiability: The idea, linked to Karl Popper, that a scientific claim must be testable in a way that could show it to be wrong.Example: 'All swans are white' can be disproved by one black swan.
Paradigm shift: A term from Thomas Kuhn for a major change in the basic assumptions and methods of a scientific field.Example: The move from an Earth-centred to a Sun-centred model of the solar system.
Primary and secondary sources: Primary sources come from the time studied; secondary sources interpret or analyse those materials later.Example: A soldier's diary is primary; a modern textbook chapter about the battle is secondary.

Optional themes

Knowledge and technology: An optional theme examining how tools such as the internet, algorithms and artificial intelligence change how knowledge is produced, stored and trusted.Example: Does relying on search engines change what we feel we need to remember?
Knowledge and language: An optional theme on how words, translation and framing shape what we can know and communicate.Example: Calling a policy a 'tax relief' or a 'tax cut' may frame how voters judge it.
Knowledge and politics: An optional theme on how power, authority and institutions influence the production and acceptance of knowledge.Example: Who decides which history is taught in national school curricula?
Knowledge and religion: An optional theme on religious knowledge, faith, revelation, interpretation of texts and how believers and non-believers evaluate religious claims.Example: How do different traditions decide what counts as an authoritative reading of a text?
Knowledge and indigenous societies: An optional theme on how knowledge is held, passed on and protected within indigenous communities, including oral traditions and land-based knowledge.Example: Traditional ecological knowledge about fire management is now studied alongside forestry science.

Assessment

TOK exhibition: The internally assessed task in which a student presents three objects linked to one of the IA prompts, with a written commentary of up to 950 words.Example: Choosing a smartphone, a family recipe and a museum label to explore a prompt about how knowledge is preserved.
IA prompt: One of 35 questions about knowledge set for the exhibition; the student picks one and connects every object to it.Example: A prompt might ask whether some types of knowledge are more useful than others.
TOK essay: The externally assessed piece: a response of up to 1,600 words to one prescribed title from the list set for each exam session.Example: A strong essay states a clear answer, tests it against counterclaims and supports each point with specific, varied examples.
Prescribed title: A question released by the IB for each exam session, from which students choose one to answer in their essay.Example: Answer the title exactly as worded and define its key terms early in the essay.
Exhibition object: A specific real-world item (or image of one) with its own context, used to show how TOK appears in the world around us.Example: 'A photograph of my grandmother's handwritten letter' is stronger than 'letters' in general.
Ways of knowing (previous course): Language, sense perception, emotion, reason and other faculties that structured the TOK course before 2022; the current course does not organize content around them.Example: You may still discuss perception or emotion, but frame them within the knowledge framework rather than as separate units.