Inference and Must Be True
Inference questions test textual support, conditional chains, contrapositives, quantifiers, modality, formal logic, and avoiding new information.
How to study for the LSAT
Use the current LSAC format as your map: make Logical Reasoning automatic, build passage structure habits, then rehearse timed sections and Argumentative Writing source use.
Core concepts
Concept 1
Inference and Must Be True questions reward the answer that follows the official source, the professional role, and the stated facts.
Exam cue: Identify the candidate role, client or public risk, source rule, calculation, or process step being tested.
Concept 2
The strongest answer identifies the rule, safety concern, ethical duty, calculation, client factor, or process step before acting.
Exam cue: Check whether the fact pattern is using a national standard, jurisdiction rule, handbook policy, or scenario-specific instruction.
Concept 3
Eliminate answers that ignore requirements, skip documentation, overreach the role, or treat convenience as the standard.
Exam cue: Choose the compliant and professionally scoped answer before the convenient or familiar answer.
Risk pitfalls and guardrails
Treating related standards as interchangeable without checking the source.
Guardrail: Avoid answers that rely only on habit, ignore the stated source, skip safety or compliance steps, or choose convenience over the professional standard.
Skipping screening, documentation, authorization, sanitation, recordkeeping, or other required procedure.
Guardrail: Avoid answers that rely only on habit, ignore the stated source, skip safety or compliance steps, or choose convenience over the professional standard.
Choosing an answer that protects convenience instead of client safety, public protection, or the stated professional duty.
Guardrail: Avoid answers that rely only on habit, ignore the stated source, skip safety or compliance steps, or choose convenience over the professional standard.
Memory anchors
Must Be True
A must-be-true answer is forced by the stimulus.
Most Strongly Supported
A most-strongly-supported answer has the best textual support even if it is not logically forced.
Conditional Chain
A conditional chain links if-then relationships in the same direction.
Contrapositive
The contrapositive reverses and negates a conditional statement while preserving truth.
Quantifier
Quantifiers such as all, some, most, and none control logical strength.
Modality
Modal words such as must, could, likely, and never control the answer's strength.
No New Info
Inference answers should not introduce unsupported new facts.
Formal Logic
Formal logic translates relationships into symbolic or structural form.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
Every member of the archive team speaks either French or German, and some speak both. No member who speaks German works only on weekends. Which statement must be true?
All manuscripts accepted by Journal K are reviewed by at least two editors. Some manuscripts reviewed by at least two editors are rejected. What follows?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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