11.   If positive reinforcement is as easy to get as a toothpick at a restaurant, it becomes almost useless as a training tool.

12.   If Lewinsky is useless as a witness, of course, Starr might decide to turn her into a defendant.

13.   If indicted, the lawyers said, the troopers would be useless as prosecution witnesses and the charges against their clients would probably be thrown out.

14.   My Powerbook sat in its dusty bag in the corner, as overqualified and useless as a Ph.D. at an orgy.

15.   Otherwise, the Rangers rendered their closer useless as the Maytag repairman.

16.   Owing to their exposed position, the launchers were useless as weapons but convenient as binoculars because they were equipped with night-vision scopes.

17.   Techniques of timing and tinkering to influence sex not only kill romance, but are useless as well, they say.

18.   The manual is fun to read but is fairly useless as a reference text.

19.   Thus, their historicism was as useless as the medieval finery adorning Victorian Gothic railway stations.

20.   Useless as a vehicle, the bicycle became the basis of an article by Jones in a publication of the Massachusetts Institute of Technology called Bicycle Science.