The point is as follows. A perfectly clear syntactical paradigm ( the question) engenders a sentence that has at least two meanings of which the one asserts and the other denies its own illocutionary mode.
Again with the multiple meaning line. I agree that there are different ways to read and understand each text. I get that, but the thing I miss getting is the one that tells you which is the valid one. Who gives out the weight distribution here. I keep seeing how the text can be pulled in which ever direction the reader wants and the text can lose its own idenity. Maybe I'm reading too much into it.