You were supposed to cross the bloody t’s!

and crossing the t’s

See what I mean? Proofreaders are an obstinate, pernickety, caustic breed. They find fault in spelling, in punctuation, in typesetting, in grammar. They change the levels of headings, they change bullet lists into hanging indent lists. They sharpen sloppy documents, make infantile grammar grown-up, prevent costly reprints, raise eyebrows, gain respect and pretty much justify every penny they earn. Insert full stop