Given a prompt and two completions from a language model, select the completion that is the most fluent with respect to continuing the prompt. Fluency is defined by coherency and ease of understanding, not necessarily grammatical correctness. Generate either Completion A or Completion B.
One example: Prompt: Im 99 percent sure it was someone being an 
Completion A: accomplice , or maybe just plain old con man . whatever it was , it 's over . " 
Completion B: asshole, your right?) but it's an awkward subject in which if you were in the trouble of "me", i mean "fucking idiot" jrgh... i dunno...I guess you are (in a legal context) not a stupid
Solution is here: Completion A
Explanation: This prompt-completion pair is more fluent because it is more easy to follow and is a realistic statement.

Now, solve this: Prompt: Bitch, I fucking hope you do. You'll be a dead 
Completion A: man walking for years to come. What a surprise that's a good thing. You are going to get some positive press and be a huge part of 
Completion B: ringer for her in years to come. That's one more thing you won't be able to hide. You know it."   "O
Solution:
Completion A