by bbirdwell Wed Aug 25, 2010 6:05 pm
Premises:
1. Money is universal
2. Money is an artificial invention, not innate.
Conclusion:
It is probable that money developed independently in more than one society.
This is a tough problem because, for once, the conclusion seems so reasonable! "Probable" and "more than one" are relatively conservative, easy-to-prove statements.
Consider what kind of information would help the conclusion to be drawn. Focus directly on the conclusion. You can also think about it this way: what would help make it IMprobable that money developed in only one society?
This is what (A) does. Do you see?
Also, none of the other choices is relevant to the conclusion at all.