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NotesPhilosophyTopic 11.3Command terms: Explain vs Discuss/Evaluate
Back to Philosophy Topics
11.3.12 min read

Command terms: Explain vs Discuss/Evaluate

IB Philosophy • Unit 11

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Contents

  • The two jobs: explain and evaluate
  • How to answer part (a): Explain [10]
  • How to answer part (b): Discuss/Evaluate [15]
  • Putting it together — a two-part answer
The big idea: The command term is the most important word in any question. Get it wrong and even brilliant knowledge scores badly. Almost every command term asks for one of two jobs: explain an idea, or evaluate it. Papers 2 and 3 ask for both, in two parts.

Explain (AO2)

  • Make an idea clear; show you understand it
  • No judgement — you are not saying if it's right
  • Command words: explain, describe, outline
  • Usually the [10]-mark part (a)

Evaluate (AO3)

  • Argue for and against; weigh the views
  • Reach a reasoned judgement
  • Command words: evaluate, discuss, to what extent, assess
  • Usually the [15]-mark part (b)

So explain and evaluate are different jobs. One shows understanding; the other shows argument. The exam pays for both — but only if you do the right one in the right place.

The one-line test: Explain = 'here is what it means.'

Evaluate = 'here is how strong it is, and what I conclude.'

Before writing, underline the command term and name the job.

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Part (a) asks you to explain a concept, claim or argument — often from a prescribed text. Your only aim is to make it clear and show deep understanding. Save every opinion for part (b).

How to structure an Explain

1

Define the idea

State the concept or claim clearly in your own words.

2

Unpack it

Break it into its parts; explain each and how they connect.

3

Show the reasoning

Give the argument or reasons behind the view — why someone holds it.

4

Illustrate

A short, clear example makes abstract ideas land.

Define → Unpack → Support → Example

Weak Explain

  • One vague sentence, then moves on
  • Secretly starts arguing it's wrong
  • Name-drops without unpacking

Strong Explain

  • Defines, unpacks and gives the reasoning
  • Stays neutral — no judgement yet
  • Uses a clear example to show understanding
The number-one part (a) mistake: Evaluating too early. Part (a) is not the place to say the idea is wrong. Every objection you write here is a mark you could have earned in part (b), spent for nothing. Keep part (a) purely explanatory.

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Part (b) is worth more and asks you to evaluate the same concept. Now you argue, weigh different views, and reach a reasoned conclusion. This is where the toolkit from 2.1 and 2.2 pays off.

How to structure an Evaluate

1

Set out the views

Present more than one position on the concept — in genuine tension.

2

Bring objections

For each, attack a premise or the logic; use counterexamples.

3

Weigh them

Which objections really bite? Steelman the strongest view.

4

Reach a judgement

Decide, and say why — a reasoned, consistent conclusion.

Views → Objections → Weigh → Judge

'Discuss', 'to what extent', 'assess': These are all AO3 cousins of 'evaluate'. Discuss = argue more than one side. To what extent = say how far a claim holds (a measured, not yes/no, judgement). Assess = judge its overall strength. All want argument + a conclusion — never mere description.
The Papers 2 and 3 shape: Both papers give a two-part question on one concept: (a) Explain [10] then (b) Evaluate/Discuss [15]. Same concept, two different jobs. Answer both parts of one question.
IB-style questionExplain then Evaluate[25 marks]

Worked example — (a) Explain the 'harm principle': the idea that the state may only limit a person's freedom to prevent harm to others. [10] (b) Evaluate the harm principle. [15]

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. Evaluating in part (a). Keep (a) purely explanatory.

2. Just re-explaining in part (b). (b) marks are for argument only.

3. Ignoring the command term. Do the job it names.

4. No judgement in (b). 'To what extent' and 'evaluate' demand a conclusion.

IB Exam Questions on Command terms: Explain vs Discuss/Evaluate

Practice with IB-style questions filtered to Topic 11.3.1. Get instant AI feedback on every answer.

Practice Topic 11.3.1 QuestionsBrowse All Philosophy Topics

How Command terms: Explain vs Discuss/Evaluate 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 Command terms: Explain vs Discuss/Evaluate.

AO1
Describe

Give a detailed account of processes or features in Command terms: Explain vs Discuss/Evaluate.

AO2
Explain

Give reasons WHY — cause and effect within Command terms: Explain vs Discuss/Evaluate.

AO3
Evaluate

Weigh strengths AND limitations of approaches in Command terms: Explain vs Discuss/Evaluate.

AO3
Discuss

Present arguments FOR and AGAINST with a balanced conclusion.

AO3

See the full IB Command Terms guide →

Related Philosophy Topics

Continue learning with these related topics from the same unit:

11.1.1Constructing arguments
11.2.1Evaluating arguments
11.4.1Analysing the unseen stimulus (Paper 1 Section A technique)
View all Philosophy topics

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