11.   Health policy did not escape this intellectual challenge, but policy prescription cannot be assumed to lead to policy change.

12.   Although photographers and designers treated him with respect, Hounsou said, he wanted more of an intellectual challenge.

13.   As a stay-at-home dad, Gray has simply discovered the additional intellectual challenge of getting inside the head of a kindergartener.

14.   But now The Christian Century has come up with a variation on the concept that constitutes a genuine intellectual challenge.

15.   Fans who consider picking a Derby winner an intellectual challenge must first come to a fundamental decision.

16.   For now, the finding is more an intellectual challenge to researchers than a practical discovery.

17.   He said Mitnick breaks into computer systems for the intellectual challenge, not for personal gain.

18.   Holmes has spent his career studying cancer, but he decided he needed a new intellectual challenge.

19.   I broke into computers for the fun, the thrill and the intellectual challenge.

20.   In some ways, the US Senate presents a greater intellectual challenge, he said.