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NotesPhilosophy HLTopic 4.1Weighing the three theories
Back to Philosophy HL Topics
4.1.57 min read

Weighing the three theories (Philosophy HL)

IB Philosophy · Unit 4

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Contents

  1. 1Three lenses, each with a blind spot
  2. 2Strengths and weaknesses, side by side
  3. 3How to weigh them in an answer
  4. 4Paper 1 Section B — a worked plan
The big idea: You've met three answers to 'what makes an act right?' — character, duty, results. None is a knockout winner.

What the exam rewards

  • Not picking a favourite.
  • Seeing what each theory gets right and where each has a blind spot.
  • Then judging between them with a reason.

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Lay the three families out together and their trade-offs jump out.

What each gets RIGHT

  • Virtue: fits real life — we admire good people, not rule-followers
  • Duty: protects the individual — some things you just can't do to someone
  • Results: takes consequences seriously — outcomes really do matter

Each one's BLIND SPOT

  • Virtue: vague when you're stuck — 'be good' doesn't say what to DO
  • Duty: can be cold — keep the rule even when it causes disaster
  • Results: can trample one person for the many's benefit
A non-Western view of duty: dharma: Duty isn't only a Western idea. In Indian thought, dharma is the right way to act given your role and situation — closer to deontology than to results-counting.
What dharma adds: It shows the 'follow your duty' family runs across cultures too. And it adds a twist Kant lacks: your duties can depend on who you are (your role), not only on universal reason.
Checkpoint — the trade-offs: In one line: virtue is realistic but vague, duty protects but can be rigid, results matter but can trample the one. Hold these three trade-offs — they power every evaluation.

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Weighing isn't listing all three — it's showing which measure fits a case best, and why.

Watch a clash get resolved: A nurse can save five patients only by quietly letting one die. Here is what each theory says.
TheoryIts verdict
ResultsSave the five.
DutyYou may not kill the one, even to help many.
CharacterAsks what a wise, compassionate nurse would do — and might refuse the cold arithmetic.
What a strong answer does: A strong answer doesn't just report the three verdicts; it argues WHICH measure should win HERE — perhaps that duty's protection of the one outweighs the numbers — and gives a reason.
Go further — higher-level insight: The sharpest move is to notice the theories may answer different questions rather than compete — so maybe a full ethical life needs all three. Arguing they combine rather than compete is a top-band conclusion.

Three different questions

  • Virtue asks who to BE — good character to see the situation.
  • Duty asks what you're REQUIRED to do — duties to protect the vulnerable.
  • Results ask what to AIM at — an eye on outcomes.
Checkpoint — weighing: In one line: don't list the three — argue which measure fits the case, with a reason, and maybe show they work together. That's what Section B rewards.
How Section B works: Section B is the OPTIONAL-theme essay [25]: you pick one question from your theme (here, Ethics) and write a full argued response — no stimulus.

How to answer it

  • The command is usually 'Evaluate' or 'Discuss'.
  • Present a claim, argue for and against it, and reach a reasoned conclusion.
  • Normative ethics is the richest ground for it.
IB-style questionEvaluate[25 marks]

Evaluate the claim that the right action is always the one that produces the greatest good for the greatest number.

Model answer plan

See the mark-by-mark plan — for / against / judgement, with marking guidance — in study mode.

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Common mistakes: 1. Describing the theories instead of arguing the claim. 2. Only one side — 'Evaluate' needs for AND against. 3. No conclusion — decide, with a reason. 4. One theory only — bring in a rival (duty or virtue). 5. Name-dropping — a name earns nothing without its argument.

IB Exam Questions on Weighing the three theories

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How Weighing the three theories Appears in IB Exams

Examiners use specific command terms when asking about this topic. Here's what to expect:

  • Define

    Give the precise meaning of key terms related to Weighing the three theories.

    AO1
  • Describe

    Give a detailed account of processes or features in Weighing the three theories.

    AO2
  • Explain

    Give reasons WHY — cause and effect within Weighing the three theories.

    AO3
  • Evaluate

    Weigh strengths AND limitations of approaches in Weighing the three theories.

    AO3
  • Discuss

    Present arguments FOR and AGAINST with a balanced conclusion.

    AO3

See the full IB Command Terms guide

Related Philosophy HL Topics

Continue learning with these related topics from the same unit:

4.1.1What makes an action right?4.1.2Virtue ethics4.1.3Deontological ethics4.1.4Teleological / consequentialist ethics
View all Philosophy HL topics
Improve your exam techniqueCommand terms, paper structure, and mark-scheme tips for Philosophy HL
Previous4.1.4Teleological / consequentialist ethicsNextWhere do moral values come from?4.2.1

11 practice questions on Weighing the three theories

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