#18 - Global, Could Be True, List

[Dave Killoran]

Complete Question Explanation
(The complete setup for this game can be found here: lsat/viewtopic.php?t=9142)

The correct answer choice is (E)

Answer choice (A) is incorrect because F and V cannot be prescribed together.

Answer choice (B) is incorrect because F and V cannot be prescribed together, and also because two dietary regimens cannot be prescribed.

Answer choice (C) is incorrect because F and M cannot be prescribed together, and also because two dietary regimens cannot be prescribed.

Answer choice (D) is incorrect because from the fifth rule if N and U are prescribed, then G cannot be prescribed.

Answer choice (E) is the correct answer choice.

[LeslyLSATinLA]

I'm still confused on why A is wrong E is correct. Can someone continue explaining? The explanation for answer choice B says, "also because two dietary regimens cannot be prescribed." would this also apply to answer choice A, but V is a phys not a diet.

[Adam Tyson]

The second rule tells us that if you do not have O in the group, you cannot have F in the group:

O F

(The font here may make it hard to see, but the F in the necessary condition above is crossed out)

The contrapositive of that rule is a little easier on the brain, in my opinion, and will make clear why answer A is a problem. That contrapositive is:

F O

If F is selected, then O must also be selected, but answer A has F and does not have O, violating that rule.