1.   A particular thorny dilemma arises should the caring situation present demands beyond the level of endurance.

2.   For Clinton, affirmative action presents a thorny political dilemma.

3.   It appears time and again in op-ed pieces, newspaper and magazine articles, and books that tackle the thorny dilemmas of the genetic revolution.

4.   The issue poses a particularly thorny dilemma to Georgia legislators, who represent the interests of UPS as well as its workers and customers.

5.   While such tests sound like medical miracles, they also raise thorny ethical dilemmas.