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So I ended up getting the question right but only due to process of elimination.

PC(--some--)MB (I just reversed MB(---) PC)

PC-->P-->I

Inferences

1.PC-->I

2.MBC(--some--)P

3.MBC(---some--) I

A. Inference 3

B. Inference 3

C. Contrapositive of inference 1

D. Inference 2

E. Correct answer due to elimination (But I don't understand the answer entirely)

  • Some irritating and beautiful cats are not Persian Cats Contrapositive of P--->I is /P--->/I which is half the answer then /I(---)MBC(---)/P which seems valid. I'm a bit confused

    • Thanks!

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    1 comments

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      jordanjohnsonjr282
      Tuesday, Mar 30 2021

      The contrapositive of P --> I is /I --> /P (you have an illegal negation in your explanation).

      Assuming this is PT 13's second LR section, Q 14, choice E is correct because we don't know anything about "irritating" cats -- "irritating" doesn't trigger anything. So we can't infer anything if "irritating" is in the sufficient condition (Answer Choice E would translate to "I + MBC --> /P").

      Hope that helps!

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