Conceptualizing "Unless" in Arguments and Games

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StrictlyLiable
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Conceptualizing "Unless" in Arguments and Games

Postby StrictlyLiable » Fri Dec 10, 2010 12:04 pm

For the record, I tried to search for this information but I can't find it. This is a last chance effort to make sure that I am thinking of it right, and to get some advice to expedite the process.

I realize that its "IF NOT" then the conclusion, but taking PT 61 some of the argument answers flip-flop all crazy and makes them time consuming. So what do you guys do to figure these out faster?

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homestyle28
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Re: Conceptualizing "Unless" in Arguments and Games

Postby homestyle28 » Fri Dec 10, 2010 12:09 pm

X unless Y :: ~Y --> X :: ~X-->Y

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typ3
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Re: Conceptualizing "Unless" in Arguments and Games

Postby typ3 » Fri Dec 10, 2010 12:11 pm

61 LR1 and a few problems in LR2 were some of the most difficult LR problems I have seen, at least in modern tests.

Take for example this unless.


Jimmy is tall unless his parents are space cadets.

So, what do you know if jimmy is tall? His parents aren't space cadets.

What do you know if his parents are space cadets? He isn't tall. Just turn it into formal logic statements and you'd be fine.

kâsh
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Re: Conceptualizing "Unless" in Arguments and Games

Postby kâsh » Fri Dec 10, 2010 3:25 pm

Per the rules of "unless", wouldn't it become:

~Tall -> Space Cadets
~Space Cadets -> Tall

??

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iamcutdacheck
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Re: Conceptualizing "Unless" in Arguments and Games

Postby iamcutdacheck » Fri Dec 10, 2010 5:28 pm

homestyle28 wrote:X unless Y :: ~Y --> X :: ~X-->Y


+1

youknowryan
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Re: Conceptualizing "Unless" in Arguments and Games

Postby youknowryan » Fri Dec 10, 2010 5:56 pm

kâsh wrote:Per the rules of "unless", wouldn't it become:

~Tall -> Space Cadets
~Space Cadets -> Tall

??


this is correct.




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