 Anscombe draws attention to the fact that when there is a discrepancy between a piece of paper and what happens, the source of the error depends upon the “role” of the paper. If the paper has the role of a record, the error is in the paper. But if the paper has the role of an order or intention, the error is in what happens. Thus there can be two ways to fail to know what happens: by misrecording, and by misperforming. And one who practically knows doesn’t misperform.