#4 - Global, Cannot Be True

[Dave Killoran]

Complete Question Explanation
(The complete setup for this game can be found here: lsat/viewtopic.php?t=11796)

The correct answer choice is (C)

This is the most difficult question of the game, and one that is not easy to answer from a quick glance at the rules.

First, convert the “False” statement into terms of “true.” “Must be false” is functionally equivalent to “cannot be true,” and thus this is really a Cannot Be True question.

Second, because this is a Global question, refer to your inferences for any negative deductions. In this case, when discussing the effects of rule #3, rule #4, and rule #5, we arrived at the inference that green and yellow cannot appear in the same costume together:

• G Y

This inference is directly tested in the correct answer, answer choice (C).


However, consider for a moment the approach to take if you did not see that inference while creating the setup. In this game, that would involve two separate steps:

• 1. Refer to the templates and eliminate incorrect answer choices. Template #1 (the 3-1) quickly eliminates answer choices (A) and (B), template #2 eliminates answer choice (D), and template #3 eliminates answer choice (E). Thus, answer choice (C) is the only remaining answer choice and must be correct.
  
  2. Refer to the hypotheticals created in other questions. This approach is often helpful in Global questions with no obvious answer, and the hypothetical in question #1 eliminates answer choice (D). This approach could be used if step 1 failed to eliminate all incorrect answer choices.

Answer choice (A): This answer choice is incorrect. Template #1 proves that both green and red can be used in the costume together.

Answer choice (B): This answer choice is incorrect. Template #1 proves that both green and violet can be used in the costume together.

Answer choice (C): This is the correct answer choice. As discussed in the game setup, green and yellow can never appear in the costume together.

Answer choice (D): This answer choice is incorrect. Template #2 proves that both red and violet can be used in the costume together.

Answer choice (E): This answer choice is incorrect. Template #3 proves that both violet and yellow can be used in the costume together.