TOK essay titles May 2027: all six prescribed titles explained, with ideas and structure

The six TOK prescribed titles for May 2027 ask about the artist versus the historian, values that change over time, knowledge built on assumptions, coincidences in mathematics, simplicity when choosing explanations, and the value of paradoxes. You answer one of them in up to 1,600 words, and the essay is two-thirds of your TOK grade. Below, each title is unpacked with the terms to define, real examples to start from, a structure, and the trap that pulls essays down.

What are the six May 2027 TOK titles?

How is the TOK essay marked, and what does a 9–10 look like?

There are no separate criteria. The essay is widely reported to be marked out of 10 by global impression: the examiner reads the whole essay, asks how well it explores this title, places it in one of five levels and picks a mark within it. Check the current descriptors with your teacher.

• It stays on the title. Every paragraph does work for the exact question set.
• The argument holds together. Examples are analysed, not described, and the conclusion follows from them.
• It weighs things. Counterclaims are real, and the essay says how much its examples actually prove.

The essay counts for two-thirds of your TOK grade, and your TOK grade combines with your EE grade for up to 3 bonus points. An E in TOK means no Diploma. Our guide to IB points has the full matrix.

What structure works for every May 2027 title?

Every title either names or lets you choose two areas of knowledge (AOKs). This layout fits all six inside 1,600 words.

For a fully worked unpacking of a title, read our TOK essay guide.

Title 1: is the artist or the historian better at showing human experience?

AOKs fixed: the arts and history.

Terms to define

• Appreciation: understanding why something happened, or feeling what it was like? Choose a reading, or argue that the two need each other.
• Human experience: the personal side (fear, grief, love) or the collective side (wars, migrations, revolutions)?
• We: a survivor, a student, a reader two hundred years later?

Ideas to start from

• History, claim: casualty records, letters and archives give the First World War a scale that can be checked. A historian's account can be tested against evidence; a poem cannot.
• Arts, claim: Wilfred Owen's war poems or Picasso's Guernica make an audience feel suffering that numbers flatten.
• Counterclaim: historians use empathy too; R.G. Collingwood argued that history means re-thinking the thoughts of people in the past. And art can distort experience, as propaganda art shows.
• The blurred line: Art Spiegelman's Maus is a graphic novel built on his father's testimony; oral history records feeling as evidence.

Title 2: how can changing values still guide knowledge?

AOKs open: any two.

Terms to define

• Values: ethical values (consent, fairness) and epistemic values (accuracy, honesty, testability). Strong essays use both kinds.
• "Nevertheless": the title accepts that values change. Your job is the "how", not denying the change.
• Pursuit: the focus is the process of making knowledge, not only the finished product.

Ideas to start from

• Natural or human sciences: research ethics changed sharply after studies such as the Tuskegee syphilis study; the 1979 Belmont Report put informed consent at the centre. A change in values redirected what research is done and how, and still guides it.
• History: changing values decide whose past gets written, as the growth of women's history and colonial history shows, while the commitment to evidence stays the same.
• Counterclaim: if values keep changing, is knowledge guided by them only temporary? A reply: change can be correction, and core epistemic values change far less than surface ones.

Title 3: can knowledge built on assumptions be reliable?

AOKs: the human sciences and one other.

Terms to define

• Assumptions: unstated starting points, axioms, simplifications in a model, choices about who is sampled.
• Reliable: right every time, useful for prediction, or trustworthy within known limits? Defining this is half your argument.

Ideas to start from

• Human sciences, claim: economic models assume rational actors and still predict a great deal. Simplifying assumptions are what make knowledge possible at all.
• Human sciences, counterclaim: Kahneman and Tversky showed that people systematically depart from rational choice, and Henrich and colleagues' 2010 "WEIRD" paper showed how many psychology findings rest on Western student samples. Hidden assumptions limit how far findings reach.
• Mathematics as AOK 2: all of mathematics rests on axioms. Drop Euclid's parallel postulate and you get non-Euclidean geometry, which is just as reliable within its own axioms.
• Natural sciences as AOK 2: science assumes nature behaves the same way over time and space. That cannot be proved, yet everything depends on it.

Title 4: is every coincidence worth noticing?

AOKs: mathematics and one other.

Terms to define

• Coincidence: a pattern with no known cause. The question is whether it is real or random.
• Worth noticing: worth it to whom, and at what cost in time and attention?
• "Throw it away later": this assumes we have a reliable way to discard false patterns. Does every area of knowledge have one?

Ideas to start from

• Mathematics, claim: in 1978 John McKay noticed that 196,884 is one more than 196,883, two numbers from unrelated fields. Taking that "coincidence" seriously led to monstrous moonshine, a deep link between them.
• Mathematics, counterclaim: patterns lie. Fermat believed every number of the form 2²ⁿ + 1 was prime until Euler showed that 2³² + 1 = 641 × 6,700,417. The Pólya conjecture held for every number checked until a counterexample was found at 906,150,257. Yet mathematics has proof, so a false pattern can be thrown away for good.
• Natural sciences: Fleming's mould and Penzias and Wilson's stubborn radio "noise", which turned out to be the cosmic microwave background, were coincidences worth noticing. The replication crisis shows the other side: false patterns often are not thrown away later.

Title 5: how much should simplicity count between explanations?

AOKs open: any two.

Terms to define

• Simplicity: fewer assumptions (Occam's razor), fewer moving parts, or easier to understand? Each gives a different essay.
• Prioritised: above what? Fit with the evidence, predictive power, scope.

Ideas to start from

• Natural sciences, claim: Kepler's elliptical orbits replaced a tangle of circles on circles, and were both simpler and more accurate.
• Natural sciences, counterclaim: stomach ulcers had a simple explanation (stress, acid) until Barry Marshall and Robin Warren showed that a bacterium, Helicobacter pylori, was responsible; they won the 2005 Nobel Prize. Quantum mechanics is anything but simple, and it is the best-tested theory we have.
• History: "an assassination started the First World War" is simple. Christopher Clark's The Sleepwalkers argues for many interacting causes. In history, the simple explanation is often the misleading one.

Title 6: what is the value of the paradoxical and the counterintuitive?

AOKs: the natural sciences and one other.

Terms to define

• Paradoxical: an apparent contradiction. Counterintuitive: true, but against our instincts. Separate the two in your introduction.
• Value: new knowledge, exposing hidden assumptions, or wasted time and money?

Ideas to start from

• Natural sciences, claim: the double-slit experiment, with light behaving as both wave and particle, forced the development of quantum theory. Olbers' paradox (why is the night sky dark?) is explained by a universe of finite age.
• Natural sciences, counterclaim: chasing the counterintuitive can go wrong. The 1989 cold fusion claims could not be reproduced and cost years of effort.
• Mathematics as AOK 2: Russell's paradox forced set theory onto new foundations. The Monty Hall problem shows intuition failing at probability.
• Arts as AOK 2: John Cage's 4′33″ and Duchamp's Fountain made audiences ask what counts as art at all.

How do I choose the right title?

Not by which one sounds most interesting. Pick the one where you can answer these four questions in five minutes:

1. Can I name two real, specific examples per AOK right now?
2. Can I say what I think the answer is in one sentence?
3. Can I name the strongest argument against my answer?
4. Do I know the fixed AOK well? A mathematics title needs mathematics you understand.

Write a 150-word plan for your top two titles before you commit. The better plan wins, not the title you liked first. Discuss your choice with your teacher; it is the first interaction on your planning and progress form.

What do 9–10 essays do that others don't?

1. Real, specific examples. Names, dates, studies. Not "a scientist might…".
2. Your own examples where you can. A finding from your own IA or coursework stands out to an examiner.
3. Every paragraph answers the title. Use its key words in your topic sentences.
4. Counterclaims that hurt. The strongest objection, not a straw man.
5. Mini-conclusions. End each AOK section by saying how far the claim holds there.
6. Implications and perspectives. Who would disagree with you, and what follows if you are right?
7. Under 1,600 words, every source cited. If you use an AI tool at any stage, the IB's academic integrity rules on citing it apply; see AI for IB.

Your school sets an internal deadline ahead of the IB's own submission date, so start planning now. The most common TOK essay mistakes are worth reading before your first draft.