There’ll be an exam either tomorrow or the day after but you won’t know which day until it arrives.We saw previously that the one-day announcement is a blindspot for the class, but what of the two-day announcement displayed above? Can the class accept these words to be true?
Taken at face value, this is to accuse the teacher’s words of being false, but, for reasons already explained, this isn’t his true intent. His (artful) point rather is that her words are a blindspot for the class. The paraphrase above is supposed to make this plain and I will henceforth ignore the mocking style of argument.Ah, but what you say cannot be true! Obviously, the exam can’t be on the second day, for if it were, we’d know about it by the end of the first. Therefore, it must be on the first day, but that can’t be, because we know it now!