October 2001 LSAT Section 4 Question 21

All social systems are based upon a division of economic roles. The values of a social system are embodied in the pr...

Sangwook on January 14, 2015

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This is a MUST BE TRUE question, isn't it? I picked the right answer though, I do not clearly understand what logical structure makes (C) right answer. Please explain this. Thanks,

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Melody on January 15, 2015

Okay so the last sentence tells us that for any social system, the introduction of labor-saving technology that makes certain economic roles obsolete will tend to undermine the values in that social society.

So, we can rewrite that: If there is labor-saving technology that makes certain economic roles obsolete, then this will tend to undermine the values in that social society.

We can diagram like so:

TERO ==> TUVSS
not TUVSS ==> not TERO

Thus, the contrapositive explains to us that if the values of a social society do not tend to be undermined, i.e. "a social system whose values are not susceptible to change," then there is no labor-saving technology that makes certain economic roles obsolete, i.e. there is no technology that "can eliminate economic roles."

As you can see, the contrapositive above perfectly describes answer choice (C): "A social system whose values are not susceptible to change would not be one in which technology can eliminate economic rules."

Hope that helps! Please let us know if you have any other questions.

Sangwook on January 15, 2015

Thanks a lot for your perfect explanation!!!!^^