I agree with you, if under the sink is "Damp" then a plumber is needed!
The cabinet in question was a normal kitchen household sink closed cabinet. The EC who asked me about "Damp" locations tells me today that he was failed on a job, because the Dishwasher recpt. needed to be GFI because the AHJ considered it a damp location.
Go figure that one out!
No need to.
Ask for the art.# with substantiation/definition.
for a $13 item,typically I won't tussle, But add them up. Now you are talking principal and overhead.
I'm sure you know the type: 'I'll push- and when I get resistance- (knowledgeable)- I know what I'm dealing with.'
Kind of an inspectors way of finding who they have to watch,and not.
Years ago, I used to cave, Then when I grew confident and knew how to read...
Those folks aren't so scary.