Grouping Setup Practice Drill #5

[lizk89]

Am I missing something? Isn't the answer to question 5.1 on page 208 simply the contrapositive of the last rule: "K cannot be selected unless X is selected"?

Thus, the contrapositive: if X is not selected, K cannot be selected. And hence, the answer.

There is a whole 2 pages of explanation for this question when the answer is so apparent? I'm pretty sure my thinking is wrong and the answer cannot be so simple. Can someone confirm whether I am right or wrong.

Thanks!

[Steve Stein]

Thanks for your question.The directions say to diagram the setup and include the rules and inferences. The answer key provides an explanation of that setup, those rules, and several inferences that can be drawn. You are right, though, that if you are just looking to answer question 5.1, you can do it based solely on the last rule of the scenario.

Interesting point--thanks again!

~Steve

[lizk89]

Thanks for the speedy reply Steve!