But even those who, though they allow that Chaucer sometimes used nine syllables only, and often (with the double rime) eleven, would elsewhere crumple up an apparent hendecasyllable or dodecasyllable into ten, leave an opening to the other side. Call the means of crumpling "slur," "elision," "synaloepha," or what you will, the actual fact remains that some lines are crumpled and some not; and will permit uncrumpling to those who choose.