## LSAT Question

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Journey180

Posts: 45
Joined: Wed Apr 17, 2013 5:22 pm

### LSAT Question

All necessary Assumptions must be true.
Some things that must be true are sufficient assumptions.
And, some necessary assumptions are sufficient assumptions.

If all of the above are true, which of the following must be true?

A. There are necessary assumptions that are also sufficient assumptions but cannot be true.
B. If something must be true, and it is not a sufficient assumption, then it is a necessary assumption.
C. Some things are necessary assumptions, sufficient assumptions, and must be true.
D. This is a confusing question ( let's just say confusing to everyone lol).
E. If a sufficient assumption must be true, then it is also a necessary assumption

Daily_Double

Posts: 1031
Joined: Tue Dec 04, 2012 8:45 pm

### Re: LSAT Question

.
Last edited by Daily_Double on Sun Sep 15, 2013 9:48 pm, edited 2 times in total.

Journey180

Posts: 45
Joined: Wed Apr 17, 2013 5:22 pm

### Re: LSAT Question

Daily_Double wrote:Can't help it. Based off a brief reading from my phone, the answer is C. But these are all poorly phrased.

Don't hurt my feelings. =P

On second thought, please tell me how to phrase them better. We all learn.

Otunga

Posts: 1317
Joined: Fri Mar 15, 2013 7:56 pm

### Re: LSAT Question

I say C. too; seems obvious. It's just flat out given in the fact set.

E. isn't the correct answer to this question, but it is logically correct if we mean the following. If a sufficient assumption must be true for the argument to work, then it's a jointly necessary and sufficient assumption.

Journey180

Posts: 45
Joined: Wed Apr 17, 2013 5:22 pm

### Re: LSAT Question

Otunga wrote:I say C. too; seems obvious. It's just flat out given in the fact set.

E. isn't the correct answer to this question, but it is logically correct if we mean the following. If a sufficient assumption must be true for the argument to work, then it's a jointly necessary and sufficient assumption.

Good observation: it doesn't work in the structure I have laid out above. but, be warned: in reality, it does.

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