PT71.S3.Q24 (Cameras and Concrete) - Does the Video have the Contrapositive Mixed Up?

tonypepperonitonypepperoni Core Member
edited October 2021 in Logical Reasoning 80 karma

The 7sage video says that the stim. says:

S -> (U or C)

thus, S -> (C -> U)

But this doesn't seem right?

Shouldn't the contrapositive instead be: (U and C) -> S ?

This question is in general very frustrating and confusing, but I need to understand how J.Y. came to the conclusions he came to.

Admin Note: https://7sage.com/lsat_explanations/lsat-71-section-3-question-24/

Comments

  • canihazJDcanihazJD Alum Member Sage ⭐
    edited October 2021 8313 karma

    Thats not a contrapositive. He's saying in the world of S, you must have U or C. Therefore in the world of S, if you don't have C then you have to have U.

    If A, then B or C.
    A
    B

    Therefore C

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