Last reviewed 22 Sept 2026 · 5 min read
Implicit assumptions
An assumption is something the speaker takes for granted — not said, but necessary for the statement to make sense.
Negate the proposed assumption. If the statement now falls apart or becomes pointless, the assumption is implicit. If the statement still stands, it is not.
Examples of the test in use:
- Statement: "Please switch off mobile phones during the film." Proposed assumption: people carry mobile phones. Negated: nobody carries a phone → the notice is pointless → implicit.
- Same statement, proposed assumption: mobile phones are expensive. Negated: phones are cheap → the notice still makes sense → not implicit.
What is usually NOT an assumption
- Anything the statement says outright — that is given, not assumed.
- A conclusion drawn from it.
- Something merely likely in the real world.
- A comparison the statement never makes ("this is the best method").
Strong and weak arguments
An argument is strong when it is both relevant to the question asked and weighty — it addresses the real issue and would move a reasonable person.
Five things make an argument weak:
- Irrelevance — it answers a different question.
- Triviality — true but of small consequence.
- Ambiguity — vague, or a mere assertion with nothing behind it.
- Circularity — it assumes what it is meant to prove ("yes, because it should be done").
- Extremity — it rests on a far-fetched or emotional appeal.
An argument may be strong even if you disagree with its conclusion — strength is about relevance and weight, not about which side you favour.
"Yes, because it will save lives" is short and simple, but on a road-safety question it is strong. Length is not weight.
The same sentence, two roles
Given "The state should make helmets compulsory":
- As an assumption question, the point is what the speaker takes for granted — that helmets reduce injury, and that the state can enforce such a rule.
- As an argument question, the point is whether a given reason for or against the proposal is relevant and weighty.
Read which of the two the paper is asking before evaluating anything.
Worked examples
Statement: "Buy our insurance policy and secure your family's future." Assumption: I. People are concerned about their family's future. II. Insurance is the only way to secure it.
Solution. Negate I: nobody cares about their family's future → the appeal collapses → implicit. Negate II: there are other ways → the appeal still works → not implicit. Only I is implicit.
Statement: "Candidates should reach the centre by 9 a.m." — an examination notice. Assumption: I. Candidates can read the notice. II. Candidates will be refused entry after 9 a.m.
Solution. I is necessary for the notice to function → implicit. II is a guess about consequences → not implicit. Only I.
Statement: "The new bridge has reduced travel time between the two towns by an hour." Assumption: Travel time between the towns has fallen.
Solution. That is stated, not assumed → not an implicit assumption.
Question: Should helmets be made compulsory for two-wheeler riders? Argument: Yes — head injuries are the leading cause of death in two-wheeler accidents, and helmets reduce them substantially.
Solution. Relevant and weighty → strong.
Same question. Argument: No — helmets spoil the rider's hairstyle.
Solution. Relevant to the rider's comfort but trivial next to the issue → weak.
Question: Should examinations be held online? Argument: Yes — because that is the modern way and everything should be modern.
Solution. An assertion with nothing behind it, assuming what it should prove → weak.
Question: Should public transport fares be subsidised? Arguments: I. Yes — it puts travel within reach of low-income workers who have no alternative. II. No — subsidies strain the state budget and squeeze spending on health and schools.
Solution. Both are relevant and consequential → both are strong, though they point opposite ways.
Question: Should the school day start an hour later? Arguments: I. Yes — students like sleeping longer. II. No — schools have always started at the same time.
Solution. I is an appeal to preference; II is an appeal to tradition → neither is strong.