part of the sentence after until or without sufficient or necessary?

Comments

• 1 Like

  You Gotta Show Me Alum Member

  June 2022 93 karma

  A good thing to remember is conceptualizing contrapositive of group 3 and group 4 logical indicators for whatever idea you choose to make as SC and NC.

  Your example: /Play -> Dark. Translated back to english: if we did not play, then it was dark.

  Contrapositive: /Dark -> Play. Translated back to english: if it was not dark, then we played.

  As you can see, either works.
• 1 Like

  Matt Sorr Alum Member ⭐

  June 2022 2245 karma

  I don’t think LSATMax’s explanation is in conflict with JY’s. From what I can tell, they say the same thing, but the methodology is slightly different.

  The difference is that LSATMax recommends always making the part of the sentence before the “unless” or “without” the sufficient condition and making the part of the sentence after those words the necessary condition. So, regardless of how the sentence is structured, you know to negate the first part, make it the sufficient condition, keep the second part as it is, and make it the necessary condition.

  JY, on the other hand, states that you can negate either part of the sentence and make it the sufficient condition. Logically, this is the same as always negating the first part of the sentence. If you choose to negate the second part of the sentence and make it the sufficient condition, then you create the contrapositive of if you negated the first part of the sentence and made it the sufficient condition. As we know, contrapositives are logically equivalent. So, in effect, LSATMax and JY are teaching the same thing. I imagine that LSATMax recommends always negating the same part of the sentence for the sake of simplicity, but it’s logically equivalent to what JY teaches.
• luckycharm2022 Core Member

  June 2022 57 karma

  Thank you both ! this really helps
• WinningHere Member

  June 2022 edited June 2022 417 karma

  I almost always function with what comes after the until/without as necessary condition and negate the other part. However sometimes it just makes more sense to do it the other way around. We want to remain flexible.