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: I stepped from my underwear and he stood as his boxers came off .

SOLUTION: Original

PROBLEM: They certainly heard his message , but no one could see him .

SOLUTION: Inversion

PROBLEM: His fluidity had stiffened a fraction and his delivery was somewhat weaker than everyone was used to .

SOLUTION:
Original