I've encountered similar situations many times and I am at a total loss regarding the actual meaning of the phrase.
Here's the example/reference:
I ask while chatting with my friends
"Not attending class then, I guess?"
And they reply with a simple "No". Knowing their behaviours, I know that they are NOT going to the class but I can also take the reply to mean this:
- No, your guess is wrong. I will be attending the class.
- No, I won't attend the class.
- No, I am attending the class.
The first and third have the same meaning, but sound a little different to me (because of volition).
I know that my question in such cases ("Not attending class then, I guess?" in the example) is the one causing all the confusion but then, how would I go about asking it?