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LR
Must Be True Inference
Overview
Must Be True questions ask what can be properly inferred from the given statements. The correct answer is guaranteed by the information provided.
1.Treat every statement as true and find what follows
2.The correct answer is usually modest — avoid extreme language
3.Combine two statements to derive a new conclusion
4.Watch for conditional chains and quantifier logic
All roses are flowers. Some flowers bloom in winter. No cacti are flowers.
If the statements above are true, which must also be true?
Answer A:
From "All roses are flowers" and "No cacti are flowers," we can infer: No cacti are roses. But we cannot infer anything specific about roses blooming in winter.
✗Going beyond what the premises guarantee
✗Choosing answers with extreme qualifiers
✗Treating "some" as "most" or "all"