Weird you are able to characterize 'you know perfectly well' as an aggressive trope without having any special insight into my mental state, but when I characterize something someone else wrote, you want to be all philosophical and say that we can't make any inferences about other people.

My original comment expressed skepticism about the idea that an expressive remark should be interpreted as a formal assertion of fact. I think your efforts at semantic policing are misplaced.