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IS All As are not Bs=Not all As are B RIGHT?

Crack LSAT175Crack LSAT175 Alum Member

Is this right? And what is the meaning of No As are Bs? Are these three sentence the same one? Thx.

Comments

  • Harrison_PavHarrison_Pav Alum Member
    218 karma

    No, two of them are the same, but one is different. The "all As are not Bs" would read like "if A, then not B, If B, then not A" and the "No As are Bs" would read the same way as well. The other statement, "Not all As are B" would read "There can be an A that is not a B." What this really means is, say you have 100 total As and make the Not All As are B statement, This means there has to be at least one A that is not a B. The easier way to read it would be Some As are not B. There are a few SA and MBT questions that prey on this distinction, and those are usually the harder ones.

  • Crack LSAT175Crack LSAT175 Alum Member
    43 karma

    @"Harrison Pavlasek" said:
    No, two of them are the same, but one is different. The "all As are not Bs" would read like "if A, then not B, If B, then not A" and the "No As are Bs" would read the same way as well. The other statement, "Not all As are B" would read "There can be an A that is not a B." What this really means is, say you have 100 total As and make the Not All As are B statement, This means there has to be at least one A that is not a B. The easier way to read it would be Some As are not B. There are a few SA and MBT questions that prey on this distinction, and those are usually the harder ones.

    Got it!!! Thanks!

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