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 heard footsteps walking away and she set the phone down .

SOLUTION: Inversion

PROBLEM: At least forty minutes had passed and Time had gotten away from them .

SOLUTION: Inversion

PROBLEM: Josie found the exercise to be extraordinarily clear headed for someone so young , but her permutations were flawed .

SOLUTION:
Inversion