Well of course. If I trawl the world's collected texts, "Are you sure?" correlates very strongly with the following words being an indication that previous stat

Well of course. If I trawl the world's collected texts, "Are you sure?" correlates very strongly with the following words being an indication that previous statements were erroneous. If I used that body of text to make a statistical model and used that model to predict what comes after "Are you sure?" it would very often be an indication that previous statements were erroneous.