"Ms Gettlin, will you edit the rough draft of my essay?"
Sure. Um, Drew, can you read this sentence for me?
"He learns that exorcists are impotent."
Is that what you meant to say?
"Yeah." (pause) "No."
How about exercise, instead of exorcists?
"Yeah, yeah, that's it."
Do you know what exorcists are?
"Yeah." (pause) "So, what does impotent mean?"
If you don't know, I'm not telling you.
It's the kind of thing you learn about in health class.
"Oh." (pause) "Ohhhhh." (pause) "Hehehe."