## 'Unless' Conditional Reasoning

LSAT2018
LSAT Master

Posts: 458
Joined: Wed Jan 10, 2018 1:11 am
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Just to clarify, if there is an 'unless' statement for a plural conditional statement, would this be right? I would like to clarify whether the and/or changes:

1. (A and B) unless C
Not A or Not B C

2. (A or B) unless C
Not A and Not B C

3. Not A and B unless C
A or Not B C

4. Not A or B unless C
A and Not B C

5. Not (A and B) unless C
A and B C
Dave Killoran
PowerScore Staff

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Yes, you nailed it across the board. Well done!
Dave Killoran
PowerScore Test Preparation
My LSAT Articles: http://blog.powerscore.com/lsat/author/dave-killoran
LSAT2018
LSAT Master

Posts: 458
Joined: Wed Jan 10, 2018 1:11 am
Points: 457

Thank you for your prompt response. I was just wondering how the last part would be said in a logical reasoning stimulus. How would I know whether the Not is referring to (A and B) and not just A/B? In other words, how would I distinguish number 4 from number 5?

4. Not A or B unless C
A and Not B C

5. Not (A and B) unless C
A and B C

PS. Are there any conditional statements like this in logical reasoning/analytical reasoning sections? Please tell me if there are any, because I would love to challenge myself and try them out.