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Chapter 4: Must Be True Questions - Coggle Diagram
Chapter 4: Must Be True Questions
Definition and Core Concept
Must Be True questions ask for an answer that is proven by the stimulus
Correct answers are
Directly stated
Logically inferred from the stimulus
Use the Fact Test
The correct answer must be provable based on the text.
Common Question Stem Indicators
Stem often says
“If the statements above are true...”
“Which one of the following must also be true?”
“Can be properly inferred...”
“Most strongly supported by...”
Strategy for Must Be True Questions
Don’t bring in outside knowledge
Read carefully and match the facts to the answer
Fact sets (not arguments) are common
Prephrasing is often difficult unless formal logic is involved (covered later)
Example Breakdown: Flavonoid Question
Shows how to
Identify fact connections
Eliminate strong/unsupported answers
Use paraphrasing and logical consequence
Modifier Words Matter
Be sensitive to degree words
Broad: some, many, could, likely
Narrow/strong: must, all, none, only
Use them to judge if an answer is too strong or vague
Two Types of Correct Answers
Paraphrased Answers
Reworded statements from the stimulus
Combination Answers
Logical results of combining two or more facts from the stimulus
Six Types of Incorrect Answers
Could Be True / Likely True
Sounds reasonable, but not provable
Exaggerated
Overstates what was said (e.g., "some" → "most")
New Information
Not supported or inferable
Shell Game
Swaps similar but distinct ideas
Opposite
Contradicts the stimulus
Reverse
Reverses relationships between elements
Real LSAT Example Analyses
Detailed walkthroughs of actual LSAT questions illustrating
The traps of incorrect answers
Application of Fact Test
Answer elimination techniques
Final Takeaways
Must Be True questions are foundational to all LR questions
Mastering them strengthens your overall LSAT performance
Focus on precise reading, logical connection, and avoiding strong language in answer choices
Review Summary
Always base answers on what is explicitly stated or provable
Watch for paraphrasing, combinations, and subtle logical deductions
Avoid answers with new ideas, exaggerated claims, or misused modifiers