Hibiscus Teach · Academic · Philosophy
What Makes a Good Argument?
Being right is not the same as reasoning well.
Identify an argument’s hidden assumptions, test its logic and disagree without misrepresenting the other person.
Created by Denis M., British English teacher.
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An app flags an essay as AI-generated. The tutor says: “Everyone who cheats gets flagged. You were flagged, so you cheated.” Would you accept that reasoning? Say why before trying to name the problem.
Reasons, not just confidence
Watch for: What turns a statement into a reason for accepting another statement?
Introduction to Critical Thinking · Wireless Philosophy / Geoff Pynn · Source and credit
Clip A quiz: 6 questions
Choose one answer for each question, then check and read the feedback.
Grammar in a minuteC1–C2 · Concede a premise without conceding the conclusion
Even if grants a possibility for the sake of discussion. It need not accept that the possibility is true.
Even if the essay was flagged, that would not establish who wrote it.
Original practice
You say: Grant one point made by your tutor, then explain what still does not follow.
Useful English
Original practice. Say your response before opening a model.
That conclusion depends on the assumption that…
Expose the missing link.
You say: Challenge the claim that everyone who misses a deadline is careless.
One possible response
That conclusion depends on the assumption that no one could have a good reason for missing the deadline.
I can accept the premise without accepting the conclusion.
Disagree with the inference rather than the person.
You say: A policy is popular, so someone calls it fair. Respond.
One possible response
I can accept the premise without accepting the conclusion. Popularity does not, by itself, establish fairness.
Critical Thinking: 3 questions
Choose one question, then follow up, challenge and revise. Use the others for another angle.
Can someone reach the right conclusion for the wrong reasons? Invent a convincing example.
Help me start
Separate what is true from how the person reached it.
One possible response
A person might correctly predict rain because an unreliable horoscope says so. The outcome would not make that method reliable.
Take it further: What would you need before trusting the same method again?
C2 challenge
Distinguish a lucky true belief from a justified one without treating certainty as necessary.
“Most experts agree, so we should accept it.” When is that a reasonable argument, and when is it weak?
Help me start
Ask which experts, on what question, and with what evidence.
One possible response
Relevant expert agreement can provide a good defeasible reason. It is weaker when the expertise is unrelated or the agreement is merely asserted.
Take it further: What would make you revise your reliance on the experts?
C2 challenge
Explain why rejecting blind deference does not require treating every opinion as equally credible.
What makes a disagreement worth continuing? Negotiate two conditions with your partner.
Help me start
Consider shared terms, evidence and willingness to revise.
One possible response
I would continue if we could agree what would count against our views. Otherwise we might simply repeat our positions.
Take it further: Could a conversation still be useful without agreement?
C2 challenge
Reframe your partner’s strongest reason before defending your own position.
Can the conclusion still be false?
Watch for: What is the difference between a valid argument and a sound one?
Deductive Arguments · Wireless Philosophy / Geoff Pynn · Source and credit
Clip B quiz: 6 questions
Choose one answer for each question, then check and read the feedback.
Grammar in a minuteC1–C2 · Only if: necessary is not sufficient
A only if B makes B necessary for A. It does not say that B alone is sufficient.
We should impose a penalty only if there is adequate independent evidence.
Original practice
You say: Propose a necessary condition for making an accusation, then explain why it may not be sufficient.
Useful English
Original practice. Say your response before opening a model.
Could the premises be true while the conclusion is false?
Test a deductive claim.
You say: Challenge: all cheaters are flagged; this student is flagged; therefore this student cheated.
One possible response
Could the premises be true while the conclusion is false? An honest student might also be flagged.
A stronger version of your argument would be…
Improve a view before evaluating it.
You say: Improve the claim that a flag proves cheating.
One possible response
A stronger version of your argument would be that a flag justifies a fair review, not an automatic penalty.
Critical Thinking: 3 questions
Choose one question, then follow up, challenge and revise. Use the others for another angle.
All guilty people look nervous. This person looks nervous. Is the accusation logically secure? Change the situation without changing the pattern.
Help me start
Look for another reason someone might look nervous.
One possible response
An innocent person could be nervous. The premises could therefore be true while the accusation was false. The same problem arises when a symptom has several possible causes.
Take it further: What additional premise would make the inference valid, and would you trust it?
C2 challenge
Explain why repairing validity can make premise truth harder to defend.
Can a logically impeccable argument still be a poor guide to a real decision?
Help me start
Consider doubtful premises, missing information and the decision’s consequences.
One possible response
Yes. A valid argument can start from false premises. Even a sound argument might establish a narrow point without settling the whole practical decision.
Take it further: Which premise in your own example would you investigate first?
C2 challenge
Distinguish an irrelevant but sound argument from an unsound one.
Is it better to demand certainty before acting, or to accept a well-supported probability? Agree on a rule with one exception.
Help me start
Compare reversible decisions with serious, irreversible ones.
One possible response
We could act on strong probabilities when the consequences are limited and reversible. An irreversible penalty should require much stronger safeguards.
Take it further: How would your rule change when waiting also causes harm?
C2 challenge
Separate standards of deductive proof from proportionate standards of evidence.
Mastery: use your English
Mastery: 6 questions
Original cases. Choose, then explain one answer aloud.
Grammar masteryC1–C2 · Inverted hypothetical conditions
Were + subject + to-infinitive can frame a more formal hypothetical; it does not add certainty.
Were we to punish every flagged student, we would risk penalising honest work.
Original practice
You say: Give a hypothetical consequence of adopting your partner’s proposed rule.
Critical Thinking: The accusation panel
- Which claim in the opening argument would you challenge first?
- What would count as evidence against your current view?
Fictional case: a university must decide how to respond to one flagged essay. Negotiate a fair immediate action and a general evidence rule. No one has to determine whether the student actually cheated.
Open only your own role. Share its information by speaking, without showing the card.
Private Role A
Academic-integrity officer: you must take suspicious work seriously. The essay’s style differs from earlier work, but you have no independent proof of authorship. You can request an oral explanation and a draft history. Explain what each would and would not establish.
Private Role B
Student advocate: the student says they revised the essay with permitted feedback. They can explain some choices and have partial drafts, but the records are incomplete. Protect fair treatment without insisting that uncertainty proves innocence.
- Each person gives a 45-second provisional position.
- Ask a genuine question and accurately restate the answer before challenging it.
- Agree one next action, one necessary safeguard and one unresolved issue.
- Deliver a joint 30-second decision with appropriately limited claims.
What a strong response does
- Name an assumption rather than attack a person.
- Distinguish evidence from proof and validity from premise truth.
- Make one concession and respond to a counterargument.
- State what further evidence could change the decision.
Help me start
“I accept that this warrants attention. What I cannot accept is…” / “Our decision would change if…”
One possible exchange
Officer: The flag and changed style justify a review, but neither proves cheating.
Advocate: I accept the need for a review, provided the student can explain the work and challenge the evidence.
Officer: Then we should request the draft history and an oral explanation without imposing a penalty yet.
Advocate: Agreed. We should also specify that incomplete drafts are not, by themselves, proof of misconduct.
New information: try again
New information: the flagging system marked a staff-written sample too. Revise your confidence and procedure without assuming that every flag is worthless.
On my own
Take both roles aloud, changing seats or pausing between them. Finish with one decision that survives your strongest objection.
One last thought
Complete aloud: “I am now less willing to infer ___ merely from ___.”
Practice audio
This full track includes vocabulary, useful phrases and model responses. Try the tasks before hearing all the models.
Tutor route and optional support
- Opening dilemma: 3 minutes
- Clip A block: 21 minutes
- Clip B block: 21 minutes
- Mastery quiz and brief spoken justification: 4 minutes
- Final grammar microcheck: 1 minutes
- Final Critical Thinking role task: 9 minutes
- Spoken exit: 1 minutes
Twenty-one minutes per clip block is a budget. If a clip lasts less than eight minutes, transfer the saved time to Critical Thinking, not extra teaching text. In the standard 60-minute route use one main prompt plus responsive follow-ups per block; the remaining prompts and C2 challenges are alternatives, not a requirement to discuss every question at length. No repeated full viewing in the core route. If discussion is unusually rich, retain the mastery quiz for later oral self-study rather than rushing the final exchange, and record the lesson as an extended route rather than claiming every activity fitted.
At the full eight-minute allowance for both videos, the planned oral stages provide about 29 minutes of interaction, including vocabulary examples, phrase practice and tutor turns. Shorter clips increase discussion time. This is not a claim of 29 minutes of individual student talk.
- Assume advanced English, not prior philosophy study. Value precise qualifications and responsive disagreement over specialist terminology.
- Opening and final scenarios are fictional. No claim is made about the accuracy of any real detector.
- Keep validity separate from truth and soundness. A conclusion can be true even when the reasoning fails. A plausible inference need not be a deductively valid one.
- One main Critical Thinking prompt per block is compulsory; use the others as follow-ups or a second round. Let the learner finish before reformulating their language.