What is the contrapositive of 'All S are P'?
ASome non-S are P
BSome P are non-S
CAll non-P are non-S
DAll non-S are non-P
Answer & Solution
Correct answer: C. All non-P are non-S
Contraposition swaps the terms and complements both, so 'All S are P' becomes 'All non-P are non-S'.
Keep practising Drawing Inferences and Syllogistic Reasoning
Browse all Drawing Inferences and Syllogistic Reasoning questions for SSC CGL, or explore more Reasoning topics.
Related questions
No stone is soft; all pillows are soft. Which must be true?Some books are pens; all pens are cheap. Which must be true?All teachers are readers; no reader is lazy. Which must be true?All A are B; all B are C; all C are D. Which is definitely true?Either Ravi or Sita won; Ravi did not win. SoIf it is false that no A are B, which cannot be validly inferred?From 'some A are B, some B are C', people wrongly conclude 'some A are C'. This isNo cat is a dog; all dogs are animals. Does 'No cat is an animal' follow?