Very spesific rule for In/Out Game with sub-category

Not Ralph NaderNot Ralph Nader Alum Member Inactive Sage Inactive ⭐
edited April 2016 in Logic Games 2098 karma
I am currently going through the LG bundle and I have a difficult time solving In/Out games with subcategory under time pressure. During BR I noticed in several of these games when one of the subcategories (let's call it category X ) get fulled only by putting one item in, there is reoccurring inference. The inference is, any two item from any categories that have different items of category X as their necessary condition are in a either/or relationship.

This is probably obvious to you but could you please correct me if I am wrong? Do you think having such rules might help on the actual test?
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Comments

  • runiggyrunruniggyrun Alum Inactive Sage Inactive ⭐
    edited April 2016 2481 karma
    Let me see if I understood this correctly.
    You have Ax, Bx, Cx and Dy, Ey and Fy.
    Only one x can be "in".
    You also have
    Dy-->Ax
    Ey-->Bx.

    You are asking if it's correct that
    Ey-->/Dy
    -------------------------------------
    Yes.
    Because you can write the fact that only one x is allowed as
    Ax-->/Bx
    Ax-->/Cx
    Bx-->/Cx

    Linking these (or their contrapositives) with the original premises you get:
    Ey-->Bx-->/Ax-->/Dy
    --------------------------------------------------
    That is actually a pretty advanced inference to make, so I think you're doing better than you might assume. This is exactly what the FoolProof is supposed to do, keep doing what you're doing!
  • Not Ralph NaderNot Ralph Nader Alum Member Inactive Sage Inactive ⭐
    2098 karma
    @runiggyrun Thanks for super fast comment and writing it out so clearly. This is exactly what I meant and thanks to you it is much more clear to me :)
  • Law and YodaLaw and Yoda Alum Member ⭐
    4312 karma

    I've definitely seen games like this before but can't think of any off the top of my head. Does anyone have suggestions for which In/Out game you could practice this inference?

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