LSAT Reading Comprehension — Advanced Strategies

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Global Structure vs. Local Detail

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Global structure refers to the passage's overall organization (e.g., compare/contrast, phenomenon/theory) and the author's primary purpose. Local details are specific facts, examples, or subordinate claims used to support the global structure. Hard questions often require linking a local detail back to its function within the global structure.

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The 'Principal Purpose' Trap in Comparative Reading

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In Comparative Reading, 'principal purpose' questions often require identifying the shared goal of *both* passages rather than summarizing them individually. A wrong answer choice might accurately describe Passage A but fail to account for Passage B, or vice versa. Correct answers capture the common ground of the inquiry.

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Necessary vs. Sufficient Inference

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A 'must be true' inference is logically necessary based on the text (if the passage is true, the answer *must* be true). A 'could be true' inference is merely consistent with the text but not proven by it. The LSAT heavily tests necessary assumptions; avoid answers that are possible but not guaranteed by the specific logic of the passage.

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Functional Paragraph Analysis

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This involves identifying the specific role a paragraph plays within the argumentative chain. Does it provide evidence for the previous claim? Does it introduce a counter-argument to be refuted? Does it define a term used later? Advanced analysis focuses on the *logical connective tissue* between paragraphs, not just their content.

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Distinguishing 'Claim' from 'Premise' in Law Passages

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In legal contexts, a 'claim' is a conclusion of law or fact that the author is arguing for. A 'premise' (or evidence) is the legal rule, precedent, or fact cited to support that claim. Confusing a disputed claim with an established premise leads to errors in 'strengthen' or 'weaken' questions within RC.