72 LR One Question 14
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Hi Dave,
I chose D. Chocolate causes depression (c ->d). Refusing chocolates improves our mood (not c-> not d) and the contra-positive of this one is d-> c.
That’s why I chose D. I need your help.
Your reasoning isn't bad; it just doesn't accurately reflect the facts of the passage.
Here, we were not told that there is a conditional relationship between chocolate and mood.
For (D) to be correct, we'd have to have been given an actual necessary condition, that is then mistakenly treated like a sufficient condition.
However, the passage doesn't give us any necessary condition for anything, so (D) simply doesn't apply here (by the way, the last half of (D) is also incorrect; the passage didn't claim that anything was sufficient to bring about anything else, either).
I put B. The argument concluded something about adults using a sample of only 1,000 adults. If there's no modifier in front of the noun are we assuming they mean all?
You're right (although it's not an assumption); without any modifier, the correct meaning is "all adults."
There are two problems with (B): First, the argument didn't draw a conclusion about the population as a whole; only about adults. Second (and probably more importantly) there's no indication that the sample is unlikely to be representative.