81.   The causes of corruption relate to political and economic conditions within society, and their linkage to economic problems is as complex as the types of corruption.

82.   The worry for skeptics in all this evaluation is seeking any yardstick for a process as subtle and complex as learning, as if college were a production line.

83.   They spend their days using hand signals as rich and complex as those on a baseball diamond.

84.   Topics as complex as ancient Egypt or as simple as a single color red have been the themes of these underground parties.