## diagramming unless/without/until/except

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gnomgnomuch

Posts: 540
Joined: Thu Dec 13, 2012 11:34 pm

### diagramming unless/without/until/except

Do you guys prefer to change the word to "if not" (making it a sufficient condition), or take it as a necessary condition, and then negate the other clause in the sentence?

I find the first method a bit convoluted, and sometimes sticky, whereas the 2nd method seems to work perfectly fine.

FlyingNorth

Posts: 408
Joined: Fri Mar 01, 2013 1:25 am

### Re: diagramming unless/without/until/except

gnomgnomuch wrote:Do you guys prefer to change the word to "if not" (making it a sufficient condition), or take it as a necessary condition, and then negate the other clause in the sentence?

I find the first method a bit convoluted, and sometimes sticky, whereas the 2nd method seems to work perfectly fine.

I do the second method, but go with whatever is easiest for you to understand and remember.

Posts: 52
Joined: Sat Feb 08, 2014 2:46 pm

### Re: diagramming unless/without/until/except

I agree. Negating the first clause and keeping the "unless/without" clause in the necessary condition is my go-to method. The most important thing, however, is flexibility and an intuitive grasp of contapositives, especially in sufficient assumption questions and the occasional moment when "unless" indicators come up in LG rules.

BPlaura

Posts: 197
Joined: Mon Dec 02, 2013 4:51 pm

### Re: diagramming unless/without/until/except

I began my LSAT studies with a Blueprint course, so I've always used the "if not" method. That said, I really like it and don't find it to be convoluted - do you have any examples?

I do find that students sometimes don't realize that they may need to rearrange the sentence (so they'll diagram "X if not Y" as X --> ~Y), but that's more of a misunderstanding about sufficiency vs. necessity.

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