A large slice of CLAT Logical Reasoning hands you a short argument and asks: which conclusion can be validly drawn? or which option most logically completes the argument? These are inference and conclusion in CLAT Logical Reasoning questions — and they are not about reading mood or tone. They are about logic: does the conclusion truly follow from the premises, or does it merely sound plausible? Get that one distinction right and a whole family of marks becomes reliable.
Logical Reasoning inference is not English RC inference
CLAT has two kinds of inference question, and students mix them up. In English, inference questions sit inside a reading passage and turn on tone, vocabulary and the author's attitude. In Logical Reasoning, you are handed a compact argument — a set of premises leading to a point — and asked what conclusion its structure permits.
The skill overlaps (both reward 'must follow, not could follow'), but the focus differs. Here you weigh the logical relationship between statements, not the writer's feelings. This page is about the argument-analysis kind.
Deductive validity vs mere plausibility
A valid (deductive) conclusion is locked to its premises: accept the premises and you are compelled to accept the conclusion. A merely plausible conclusion is one the premises make reasonable, probable, or tempting — but do not guarantee. CLAT loves to dress a plausible option up as the obvious answer.
- ✓Valid conclusion — true in every situation where the premises hold. Zero exceptions are possible. This is what 'validly drawn' asks for.
- ✓Plausible conclusion — likely, sensible, the way the world usually works — but you can imagine the premises being true and it still being false. That single imaginable exception disqualifies it.
- ✓The trap — the plausible option often matches your real-world intuition, so it feels safer than the dry valid one. Logic does not reward intuition; it rewards necessity.
Which conclusion can be validly drawn?
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'Which conclusion can be validly drawn?' questions
These give you premises and ask for the conclusion that cannot fail given those premises. Treat each of the four options as a candidate and run one filter on it: if the premises are true, is this guaranteed? If an option could still be false while the premises hold, eliminate it — however reasonable it reads.
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Lay out the premises as flat factsStrip the argument to its bare claims. 'All A are B. X is an A.' Seeing the skeleton stops the wording from misleading you.
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Read each option as a claimTurn it into a plain statement and ask what it actually asserts about the people, things or categories in the premises.
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Run the necessity testAsk: must this be true if every premise is true? Try to invent a single scenario where the premises hold but the option fails. Found one? Eliminate it.
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Watch the scope wordsCompare the option's quantifiers — all, every, none, only vs some, may, most — against what the premises actually licensed. A conclusion may not be stronger than its premises.
'Which most logically completes the argument?' questions
Here the argument trails off and you supply the ending. The correct completion is the statement that follows on from what came before and lets the argument hold together — not the one that simply continues the topic. Think of it as finding the conclusion the premises were building towards.
- Track the direction of the argument — what is each premise pushing towards? The completion should be where that push naturally lands.
- 'Most logically completes' means the option that the earlier statements support, not one that adds a fresh, unconnected idea.
- Beware the topical decoy — an option that mentions the same subject but does not follow from the premises is the classic wrong answer. Relevance to the topic is not the same as logical fit.
Which option most logically completes the argument?
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Main conclusion vs intermediate conclusion
Longer arguments have more than one conclusion. A statement can be a conclusion drawn from earlier premises and also act as a premise for the final point. The final point everything serves is the main conclusion; the stepping-stone on the way is an intermediate conclusion.
- ✓Main conclusion — the single claim the whole argument exists to establish. Nothing in the argument is built on top of it.
- ✓Intermediate conclusion — a sub-point that is itself supported by premises and then used to support the main conclusion. It does double duty: conclusion of one step, premise of the next.
- ✓The 'therefore' test — ask of each candidate: is this the thing the argument is finally trying to prove, or merely a rung on the ladder to it? The top rung is the main conclusion.
Which statement is the MAIN conclusion of the argument?
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Valid argument forms — in plain language
Most CLAT validity questions hinge on a few recurring patterns built around an 'if… then…' statement. You do not need symbols or notation — you need to recognise the shape of the move and whether it is sound. Here is the one valid move you can always trust.
There is a second valid move worth knowing: if you are told the 'then' part is false, you may conclude the 'if' part is false too. 'If it rains, the match is cancelled. The match was not cancelled. Therefore it did not rain.' Denying the consequence is also valid — work the chain backwards and the conclusion is forced.
Invalid forms — the two classic fallacies
CLAT's favourite traps invert the valid moves so they look almost identical. Two reversals appear again and again, and both are invalid even though they feel right.
- Affirming the consequent — given 'If P, then Q', you are told Q is true and you wrongly conclude P is true. 'If it rains, the match is cancelled. The match was cancelled. Therefore it rained.' But the match could have been cancelled for many other reasons. The conclusion does not follow.
- Denying the antecedent — given 'If P, then Q', you are told P is false and you wrongly conclude Q is false. 'If it rains, the match is cancelled. It did not rain. Therefore the match was not cancelled.' But it might still be cancelled for another reason. Again, the conclusion does not follow.
| Pattern | You are told | You conclude | Valid? |
|---|---|---|---|
| Affirm the condition | If P then Q; P is true | Q is true | Valid ✓ — the safe move |
| Deny the consequence | If P then Q; Q is false | P is false | Valid ✓ — works backwards |
| Affirm the consequent | If P then Q; Q is true | P is true | Invalid ✗ — Q may have other causes |
| Deny the antecedent | If P then Q; P is false | Q is false | Invalid ✗ — Q may still happen another way |
Which conclusion can be validly drawn?
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Over-generalisation and scope errors
A conclusion may never claim more than its premises gave it. The most common overreach is over-generalisation — leaping from some to all, from one case to every case, from this town to everywhere. The other is a scope error — quietly widening or narrowing the category the argument is about.
- ✓Some to all — premises say 'some lawyers are wealthy'; a trap option concludes 'lawyers are wealthy' (i.e. all). The jump is unwarranted.
- ✓One to every — one example is offered; the conclusion treats it as a universal rule. A single instance cannot prove a generalisation.
- ✓Part to whole — what is true of a member is assumed true of the group, or vice versa. The premise about an individual does not transfer to the class.
- ✓Drifting category — the premise talks about 'first-year students' and the conclusion silently swaps in 'all students'. The scope changed mid-argument.
Why the safest conclusion is the most modest one
A strong claim needs strong support; a modest claim needs little. Because exam premises rarely prove sweeping universals, the conclusion that hedges — some, may, in this case, is likely — is far more often the one the premises actually guarantee. The boldest-sounding option is usually the trap.
A conclusion can never be stronger than the premises that carry it.
This is not timidity — it is precision. When you face two survivors and one says 'must always' while the other says 'in this instance, may', the modest one demands far less of the premises and is usually what they can support. Reach for certainty only when the premises hand you certainty.
Which conclusion is best supported by the passage?
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A repeatable method for the exam screen
Under time pressure you cannot reinvent your approach each time. Run the same disciplined loop and validity questions become mechanical.
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Read the question stem firstKnow whether it wants the valid conclusion, the logical completion, or the main conclusion. Each needs a slightly different lens.
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Strip the argument to premisesList the bare claims and note any 'if… then…' statement and its direction. The skeleton exposes the real logic.
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Eliminate by flaw typeSweep the options naming flaws: affirming the consequent, denying the antecedent, over-generalisation, scope drift, out-of-scope. Cross them off fast.
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Apply the 'must be true' test to survivorsKeep only the option the premises guarantee. If two survive, choose the more modestly worded one.
- A valid conclusion must be true whenever the premises are true — not merely plausible or likely.
- If you can imagine the premises true and the conclusion false, the conclusion is invalid. Test every option this way.
- The main conclusion is the final point everything serves; an intermediate conclusion is a stepping-stone that is both supported and supporting.
- Valid moves: affirm the condition (P true → Q true) and deny the consequence (Q false → P false).
- Invalid fallacies: affirming the consequent (Q true → P true) and denying the antecedent (P false → Q false) — both wrongly assume P is the only route to Q.
- Watch quantifiers: a conclusion may never be stronger than its premises. The modest, hedged option is usually the safe one.
Common mistakes to stop making
- ✓Choosing the option that sounds reasonable in real life rather than the one the premises strictly guarantee.
- ✓Falling for affirming the consequent — concluding the cause from the effect when the effect could have other causes.
- ✓Falling for denying the antecedent — assuming that because the 'if' part is false, the 'then' part must be false.
- ✓Picking an intermediate conclusion when the question asks for the main one (or vice versa).
- ✓Letting a conclusion over-generalise — jumping from 'some' to 'all', or from one case to every case.