Techniques for Analysing and Evaluating Arguments

Argument analysis is not just about whether you agree with a conclusion — it is a systematic process of examining logical structure, evidence quality and reasoning. Extended Investigation requires you to apply these techniques to both published research and your own work.

Step 1: Identify the Argument’s Structure

Before you can evaluate an argument, you must map its structure:

1. Find the conclusion — what is the author ultimately claiming?
2. Identify the premises — what reasons and evidence are offered?
3. Trace the reasoning — how does the author get from premises to conclusion?
4. Note any sub-arguments — are there intermediate conclusions that support the main one?

Use argument mapping (boxes and arrows) to make the structure visible.

STUDY HINT: When reading a source, highlight the conclusion in one colour and each premise in another. Then ask: “Without this premise, does the conclusion still hold?” If yes, the premise may be redundant or weak.

Step 2: Evaluate the Premises

For each premise, ask:
- Is it factually accurate? Can it be verified?
- Is it relevant to the conclusion?
- Is it sufficient on its own, or does it need additional support?
- Is it appropriately qualified — does it avoid overclaiming?

Step 3: Evaluate the Reasoning

Examine how the premises connect to the conclusion:

Step 4: Check for Logical Fallacies

Fallacies are errors in reasoning that make an argument invalid or misleading. Common ones to detect:

• Ad hominem: Attacking the person, not the argument
• Straw man: Misrepresenting a position to make it easier to attack
• Appeal to authority: Treating an expert’s opinion as automatically correct without further evidence
• False cause (post hoc): Assuming that because A preceded B, A caused B
• Hasty generalisation: Drawing broad conclusions from too few instances
• Appeal to popularity: Claiming something is true because many people believe it

KEY TAKEAWAY: Identifying a fallacy is not sufficient — you must also explain why it weakens the argument. In examinations, name the fallacy, quote the relevant text, and explain how it undermines the reasoning.

Step 5: Evaluate the Overall Argument

After examining premises and reasoning, make an overall judgement:
- Is the argument valid (does the conclusion follow)?
- Is it sound (are the premises true)?
- Is it persuasive (is the evidence compelling given the strength of the conclusion claimed)?
- What are its limitations and strengths?

Techniques Specific to Research Arguments

When evaluating academic sources specifically, also consider:

• Methodology: Is the research method appropriate to the question?
• Sample: Is the sample size and composition adequate?
• Bias: Does the author have vested interests that might skew findings?
• Peer review status: Has the work been reviewed by independent experts?
• Replication: Have results been reproduced by other researchers?

EXAM TIP: Evaluation questions in Extended Investigation tasks often award separate marks for (1) identifying the issue, (2) explaining why it is a problem, and (3) suggesting what a stronger argument would look like. Structure your answer around these three moves.

Applying These Techniques to Your Own Work

Self-critique is just as important as critiquing others. In your Extended Investigation Journal, regularly apply these steps to your own reasoning:
- Have I clearly stated my premises?
- Does my conclusion follow from my evidence?
- Have I acknowledged alternative interpretations?
- Am I making any claims I cannot support?

APPLICATION: Practise on newspaper opinion pieces or YouTube debate clips before applying these techniques to academic articles. The skills transfer directly — the only difference is that academic arguments usually have more explicit structure.