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Can someone please share with me the formal logic? I can't seem to arrive at the correct answer.
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Can someone please share with me the formal logic? I can't seem to arrive at the correct answer.
3 comments
@ellesat525 said:
You mean E right? :smile:
Ahhh. It clicked! Definitely one for me to come back to in a few days! Thank you!
Omg I am so sorry. YES E.
You mean E right? :smile:
Ahhh. It clicked! Definitely one for me to come back to in a few days! Thank you!
First lets figure out what the conditional statements are;
1.) Unless the core of such a planetary body generates enough heat to cause volcanic action, the surface of that body will not be renewed for millions of years.
Unless - We negate an idea and make it the sufficient.
/CHV -> SNRM
2.) Any planetary body with a solid surface whose surface is not renewed for millions of years becomes heavily pockmarked with meteorite craters.
Any - introduces sufficient.
SNRM -> HPC
We can link these statements;
/CHV -> SNRM -> HPC
Negation;
/HPC -> /SNRM -> CHV
Okay so what else does the stimulus give us? Well it gives us an example of an old planetary body that is cold, which is not marked by craters.
Europa is not heavily pockmarked by meteorite craters (/HPC) so then it's surface is renewed before millions of years. Since its surface is renewed before millions of years, than the core of Europa must generate enough heat to cause volcanic action.
So answer choice E must be true.
E.) Some very cold planetary body's (Europa) have cores that generate enough heat to cause volcanic action.
The key here is the negation of the entire linked conditional chain. That negation leads us to the correct answer.
Note: It's also important to remember that "SOME" means "at least 1"