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depend on/properly drawn assumption questions #help#

Coal TarCoal Tar Member
in Logical Reasoning 11 karma

When it comes to necessary/sufficient assumption questions, I used to intuitively get to the right answer. As I am now forcing myself to apply consistent process, I am a bit confused as to how the rules apply. I understand that as a rule of thumb, question stems that feature 'depend on' require necessary assumptions, and those featuring 'properly drawn' require sufficient assumptions. I just wonder where do sufficient-and-necessary assumptions belong? #help#

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  • taschasptaschasp Alum Member Sage ⭐
    796 karma

    and those featuring 'properly drawn' require sufficient assumptions

    Well, first be careful here. "Which of the following answer choices allows the conclusion to be properly drawn" is a common SA form. But if it asks "The conclusion can only be properly drawn if..." would ask you for a NA. Granted, I'm not sure that second question wording exists on the LSAT, but the point is that you have to understand the stimulus in context. The first one translates to "AC -> Conclusion" ; the second one translates to "Conclusion -> AC".

    I just wonder where do sufficient-and-necessary assumptions belong?

    To be honest, I'm not sure what you are asking here. Do you mean a theoretical question stem like "Which of the following answer choices allows the conclusion to be properly drawn, and is also required for the conclusion to follow", which would ask for a necessary assumption that is also a sufficient assumption? The LSAT has never asked such a question before, so you wouldn't need to worry about such a question stem. But perhaps I'm misunderstanding what you're asking.

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