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Topics - Question
« on: November 29, 2004, 09:19:24 AM »
« on: November 24, 2004, 11:50:57 AM »
Can someone explain their approach to this question? I thought the conclusion would be the sentence beginning with "About three million years ago, therefore...", but apparently not.
On the basis of the available evidence, Antarctica has generally been thought to have been covered by ice for at least the past 14 million years. Recently, however, three-million year-old fossils of a kind previously found only in in ocean-floor sediments were discovered under the ice sheet covering central Antarctica. About three million years ago, therefore, the Antarctic ice sheet must temporarily have melted. After all, either sever climatic warming or olcanic activity in Antarctica's mountains could have melted the ice sheet, thus raising sea levels and submerging the continent.
Which one of the following is the main conclusion of the argument?
A) Antarctica is no longer generally thought to have been covered by ice for the past 14 million years
B) It is not the case that ancient fossils of the kind recently found in Antarctica are found only in ocean-floor sediments
C) The ice sheet covering Antarctica has not been continually present throughout the past 14 million years
D) What caused Antarctica to be submerged under the sea was the melting of the ice sheet that had previously covered the continent
E) The icesheet covering Antarctica wasmelted either as a result of volcanic activity in Antarctica's mountains or as a result of sever climatic warming
« on: November 22, 2004, 01:36:42 PM »
Powerscore advises against reading the question stem first, as a result, I often find myself having to reread the stimulus in order to look for the necessary stimulus information to answer the question. How do you guys do this? Do you really just read the stimulus once, then the question stem, and head to the answers?
« on: November 22, 2004, 11:57:48 AM »
In the LRB's Problem Set for Principle questions, Answer "C" from problem 3 is dismissed really quickly (this is the question about gifts being generous or selfish)... I can't understand why. Anyone have a better reason than that explained by the authors?
Is it because we can't conclude that Amanda's gifts are "Generous"? Because our diagram is:
G--->B and WM
« on: November 22, 2004, 11:16:06 AM »
Can someone please resolve this paradox for me:
In the discussion on Formal Logic, it's stated that the Double Not Arrow is used when exactly one of the terms is negative. So ~A--->B would give A<-|->B. But, in the discussion on Conditional Reasoning, we only create the Double Not Arrow when the Necessary Condition in negative. For example, in the Game on Birds in the forest, one clue (A--->~B) is illustrated with the Double Not Arrow, whereas another clue of the form ~A--->B is illustrated as ~A--->B and its contrapositive.
« on: November 19, 2004, 03:31:22 PM »
How do you find the main conclusion when there's a sub-conclusion with a conclusion with a conclusion indicator (ie "thus")... This is confusing.
« on: November 16, 2004, 11:31:11 AM »
How do you keep track of all the rules?
« on: November 09, 2004, 12:07:29 PM »
I've been doing this all along and it's seemed to make sense. But, Powerscore advises against it (makes me wonder if it's just to set themselves apart from the others).
« on: October 26, 2004, 02:33:02 PM »
What's up with the RC? I find it difficult, but am getting better. What works for y'all? Do you read the questions first, then read the passage? Do you read the passage twice? Do you answer any line/paragraph-specific questions right after reading the concerned section, or do you finish the entire passage first? What sort of notes do you make? Do you find POE is your most powerful tool? Do you find that lots of answers seem great but there's 1 simple word that throws them out? How do you practice for this section?
« on: October 18, 2004, 01:17:31 PM »
Can someone please tell me their reasoning for choosing the credited response for Preptest 31, Section 3, Question 3? I can't understand how that statement can possibly be derived from the conversation between the two.
Also, Preptest 31, Section 2, Question 21. What are the two flaws? Why isn't the statement about Patrice working on Thursday just as good?
Thanks so much, this will help me greatly