Question Stem Triage
Key Takeaways
- The stem tells you the task: prove, weaken, strengthen, describe, infer, resolve, apply, or match.
- Reading the stem first can prevent the common error of answering a different question from the one asked.
- Triage means sorting stems by task and expected work, not trying to predict difficulty from topic.
- A good triage system separates argument-family stems from inference-family, method-family, and formal-matching stems.
Why The Stem Comes First
The question stem is the instruction set for the problem. LSAC's own advice emphasizes reading carefully, working from the information given, and not choosing a statement merely because it is true. Stem triage operationalizes that advice: before you solve, decide what the answer must do. A true statement can be wrong for a weaken question if it does not weaken. A strong criticism can be wrong for a role question if it does not describe the named statement's function.
Reading the stem first is especially useful in Logical Reasoning because the same stimulus can support different tasks. A causal argument about a new tutoring program could be used for strengthen, weaken, flaw, necessary assumption, sufficient assumption, or evaluate. If you know the task before reading, you know whether to look for a gap, a description, a required inference, or an explanation.
Stem Families
| Stem language | Task family | Read the stimulus looking for |
|---|---|---|
| "most weakens," "casts doubt" | Attack | conclusion, support, vulnerable assumption |
| "most strengthens," "supports" | Help | conclusion, support, missing link |
| "assumption required" | Necessary assumption | what must be true for the argument to survive |
| "if assumed, allows conclusion" | Sufficient assumption | a bridge that proves the conclusion |
| "flawed because" | Flaw | the reasoning error already committed |
| "properly inferred," "must be true" | Inference | what follows from facts, no outside help |
| "method," "role," "proceeds by" | Description | how the argument is built |
| "parallel" | Match | abstract structure, force, validity, terms |
| "resolve," "explain" | Paradox | two accepted facts that need coexistence |
The point is not to memorize every possible wording. The point is to translate the stem into a verb: weaken, strengthen, require, guarantee, infer, describe, explain, apply, or match. That verb controls the answer choices.
Skeptical Versus Accepting Modes
LR uses two broad reading modes. In skeptical mode, you evaluate an argument. Strengthen, weaken, flaw, assumption, and evaluate stems ask you to find the support gap. You should be asking, "Why does the evidence not yet prove the conclusion?" The premises are usually accepted for the purpose of the question, but the link to the conclusion is under inspection.
In accepting mode, you do not attack the stimulus. Inference and must-be-true stems ask what follows from the provided statements. Paradox stems ask you to accept both facts and explain their coexistence. Method and role stems ask you to describe structure, not judge persuasiveness. Parallel stems ask you to preserve form, even when the subject matter changes completely.
Confusing these modes creates predictable misses. Students weaken an inference stimulus by bringing in an outside possibility. They choose a true flaw description on a method question that asks only how the argument proceeds. They deny one side of a paradox instead of explaining both sides. Stem triage prevents that by locking the mode before answer evaluation.
Fast Triage Labels
Use short labels in practice review:
- W: weaken
- S: strengthen
- NA: necessary assumption
- SA: sufficient assumption
- FL: flaw
- INF: inference or must be true
- MR: method or role
- PX: paradox
- PI: point at issue
- PR: parallel reasoning or parallel flaw
During review, sort misses by label. If most errors are NA and SA, your issue is not "Logical Reasoning" generally; it is assumption handling. If timing collapses on PR, your issue is formal matching and answer-choice load. If misses scatter across all labels, the problem may be stem discipline rather than content.
Triage And Time
Triage also helps timing. A short main-conclusion stem should rarely become a three-minute question. A dense parallel-flaw stem may deserve a mark before it becomes a time sink. A paradox stem with two clear facts can be solved quickly if you stop trying to disprove either fact. Stem type does not guarantee difficulty, but it predicts the kind of work ahead.
A practical timing rule is to mark high-load stems early when the first read does not produce structure. Parallel, parallel flaw, complex principle-apply, and formal sufficient-assumption questions can be worth solving, but they are dangerous if you start translating answer choices without a clean abstraction. Mark, move, and return with the section protected.
Triage In Action
Suppose the stem asks: "Which one of the following, if true, most seriously undermines the reasoning?" Translate it as weaken. Read for conclusion and support. If the argument says a museum's longer hours caused higher attendance because attendance rose after hours expanded, prephrase alternate causes, seasonal effects, marketing changes, or pricing changes. A choice about visitor satisfaction may be true, but it weakens only if it attacks the causal link.
Now change the stem: "Which one of the following can be properly inferred?" The same museum facts no longer invite alternate causes. You must stay inside the text. If the passage says attendance rose after hours expanded, you may infer attendance was higher after the change than before. You may not infer the hours caused the increase unless the passage gives enough support for causation.
That contrast is the essence of triage. The stimulus gives material; the stem gives the job. Correct LR work requires both.
A stem asks, "Which one of the following, if true, most helps to explain the apparent discrepancy?" What should the test taker do first after reading the stimulus?