21. Gapping has been thoroughly studied, and it is therefore reasonably well understood, although the theoretical analyses can vary significantly.22. One can note in this area that the gapping / stripping mechanism treats the negation in a special way in general. 23. The b-clauses are failed attempts at gapping ; they fail because the gapped material does not correspond to a catena. 24. Many linguists see stripping as a particular manifestation of gapping where just a single remnant remains in the gapped / stripped clause: 25. The fact that gapping and stripping are alike in these respects does indeed suggest that they are one and the same ellipsis mechanism. 26. Gradually, as low-sashed coats and skirts gapping at the waist came out, one could see what Elbaz was up to. 27. For people around the country who heard the message " All circuits are busy, " call gapping was a likely cause. 28. Answer ellipsis is like sluicing in this regard, but unlike gapping , stripping, VP-ellipsis, and pseudogapping, e . g. 29. Like gapping , stripping allows the object form of the pronoun ( = disjunctive pronoun ) to function as the subject in the stripped clause. 30. Making sure the tibia remains in neutral rotation, a varus force is used to ensure there is no medial compartment gapping of the knee.