TASK DEFINITION: In this task you are given a sentence with one coordinating conjunction (for, and, nor, but, or, yet, and so). You must judge whether the order of two coordinated clausal conjoints have been inverted or not. Inversion would result in the sentence sounding unnatural. Label the instances as "Original" or "Inversion" based on your judgment.
PROBLEM: She walked fast , but he had no trouble keeping up .

SOLUTION: Original

PROBLEM: Now he knew that he wasn 't , but he thought he was .

SOLUTION: Inversion

PROBLEM: She 'd made up her mind to see this through , but okay , so her stinging pride burned a little hotter .

SOLUTION:
Inversion