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IB THEORY OF KNOWLEDGE · INTERNATIONAL SCHOOL

TOK is not a list of philosopher names. It is practice in asking: “What justifies saying that I know?”

This toolkit turns a HAOLLA TOK class on philosophical reasoning, certainty, induction and deduction, counterclaims, paradigm change, paradox and contradiction into usable moves for essays, discussion and exhibition reasoning.

Use the reasoning framework Build a TOK argument in HAOLLA

Source typeFirst-party HAOLLA class record

ForIB TOK · International-school learners

Core outputClaim → Counterclaim → Refined Claim

Reviewed4 Oct 2026

The one-sentence answer

A strong TOK response does not stop at “true” or “false.” It asks what evidence and method support the claim, how certain we should be, where the claim’s scope becomes weaker, what a serious counterclaim changes, and how the conclusion should be refined.

Knowledge Claim

Compress what is being claimed as knowledge into one sentence. Separate the claim from the reason offered for it.

Evidence & Method

What supports the claim—observation, measurement, testimony, logic, interpretation or a model? How does the method shape what can be known?

Degree of Certainty

Replace a binary certain/uncertain judgment with a calibrated one. What evidence would increase or reduce confidence?

Boundary & Scope

Where does the claim apply? A claim can be strong under one set of conditions and weak when generalized beyond them.

Counterclaim

Do not add an opposing view as decoration. Find a different interpretation, method or hidden assumption that genuinely changes the conclusion.

Refined Claim

After considering the limitation, rewrite the opening claim so it becomes more conditional, precise and defensible.

INDUCTION vs DEDUCTION

Distinguishing induction from deduction clarifies where certainty can break down.

Real arguments can mix both. The practical goal is not labeling for its own sake; it is identifying what the conclusion depends on.

	Induction	Deduction
Direction	Observations or cases → broader conclusion	Premises or rule → specific conclusion
TOK question	Is the evidence sufficient? What would a counterexample change?	Are the premises justified? Does the conclusion really follow?
Useful sentence	“The evidence suggests…, but the generalization is limited by…”	“If the premise is accepted…, then…, yet the premise itself depends on…”

PARADIGM & MODEL REVISION

Use paradigm change to ask how knowledge models are revised.

The class used geocentric/heliocentric models, Newtonian mechanics, relativity and quantum mechanics as a broad sequence. For trustworthy public learning, the point is not a simplistic “old wrong, new right” story, but a comparison of evidence, explanatory power, methods, scope and remaining limits.

1 · Prior model

What did the model explain well, and what assumptions did it make?

2 · New problem or evidence

What observation, anomaly or method put pressure on the earlier explanation?

3 · Revised model

What does the newer model explain better, and what limits remain?

Science history and modern physics are complex. These examples are discussion contexts, not proof of metaphysical claims.

TOK SIX-MOVE PARAGRAPH

Build one TOK paragraph in six moves.

Make a concept do analytical work instead of simply naming it.

1 · CLAIMWhat is being claimed as knowledge?

2 · CONCEPTWhich conceptual lens analyzes it?

3 · EXAMPLEWhat concrete case grounds the point?

4 · ANALYSISWhy does the example support the claim?

5 · COUNTERCLAIMWhat genuine limitation matters?

6 · IMPLICATIONHow should the opening claim change?

CLASSROOM PROMPTS

Questions that turn memorized concepts into reasoning

Use them for discussion, essay planning or self-checking.

What exactly is the knowledge claim?

What would count as evidence against it?

Are you challenging the evidence, the reasoning, or the interpretation?

How certain is the claim, and what would change that confidence?

Where is the boundary of this claim?

Can an absolute conclusion be rewritten as a conditional one?

What is the strongest genuine counterclaim?

Would the same reasoning work in another area of knowledge?

CROSS-SUBJECT TRANSFER

Move one epistemic question across science, history, literature and mathematics.

Philosophical reasoning becomes more useful when it travels with the learner into other subjects.

Science

What does a model explain, and what kind of evidence can force revision?

History

How can perspective and context change the interpretation of the same source?

Literature & Language

Is a tension a contradiction or a paradox? How far can interpretation go before textual evidence stops supporting it?

Sources and accuracy boundary

This page begins with a first-party HAOLLA TOK class record from 4 Oct 2026. The class notes include compressed examples from science history, modern physics and free-will debates. We preserve the reasoning structure without turning those compressed examples into independent scientific facts or settled philosophical conclusions.

Official IB TOK materials for the nature-of-knowledge, evidence, methods, perspective and certainty context
Stanford Encyclopedia of Philosophy for background on scientific revolutions and free will
HAOLLA class records as the first-party source for lesson sequencing, prompts and assignment design

IB: What is TOK? · SEP: Scientific Revolutions · SEP: Free Will

FAQ

Frequently asked TOK reasoning questions

Concise answers for students, teachers and answer engines.

Do I need to name many philosophers in TOK?

Names can be useful, but the stronger priority is to use concepts to analyze a knowledge claim: its evidence, methods, assumptions, scope, counterclaims and implications.

How are induction and deduction useful in TOK?

They help identify what a conclusion depends on: limited observations and generalization in induction, or the quality of premises and logical form in deduction.

Why use paradigm shifts in TOK?

They provide a useful context for asking how models change when evidence, methods, explanatory standards or scope change.

Is this a science lesson?

No. Science examples are used as contexts for TOK questions about evidence, models and uncertainty. Scientific details should be checked against current authoritative subject sources.

Bring one TOK prompt you are working on.

HAOLLA can turn it into a claim → evidence → certainty → scope → counterclaim → refined-claim workflow, then connect the reasoning to a student-owned draft, discussion or revision task.

Start in HAOLLA Ask about TOK learning