They must be referring to Muphry’s Law: “If you write anything criticizing editing or proofreading, there will be a fault of some kind in what you have written.” The name of the law is a deliberate misspelling of Murphy’s law (so don’t bother quoting me and pointing that out). Muphry’s Law also dictates that, if a mistake is as plain as the nose on your face, everyone can see it but you. Your readers will always notice errors in a title, in headings, in the first paragraph of anything, and in the top lines of a new page. These are the very places where authors, editors and proofreaders are most likely to make mistakes.
They must be referring to Muphry’s Law: “If you write anything criticizing editing or proofreading, there will be a fault of some kind in what you have written.” The name of the law is a deliberate misspelling of Murphy’s law (so don’t bother quoting me and pointing that out). Muphry’s Law also dictates that, if a mistake is as plain as the nose on your face, everyone can see it but you. Your readers will always notice errors in a title, in headings, in the first paragraph of anything, and in the top lines of a new page. These are the very places where authors, editors and proofreaders are most likely to make mistakes.