Passage Summary: If you use big words and complicated sentences to hide boring ideas, you will either confuse your readers or look like you are trying too hard to seem smart.

Conclusion: Writers should avoid using overly complex language and structure when expressing simple or common ideas.

Reasoning: Using fancy words for mundane thoughts confuses inattentive readers and makes the writer look pretentious to alert readers.

Analysis: This 'Complete the Argument' task functions much like a 'Must Be True' question. The stimulus sets up a clear 'if-then' relationship: if you use elaborate syntax for mundane ideas, the result is negative for both types of readers. To find the most logical principle, we should look for a recommendation that avoids these negative outcomes. The most effective principle will likely suggest a match between the complexity of the thought and the complexity of the language. Expect an answer that encourages clarity or warns against unnecessary ornamentation.