11.   So, ethicists say, transplant doctors have tried to reassure the public, steering clear of murky areas.

12.   The question of what kinds of public support for parochial education violate the Establishment Clause of the First Amendment remains a murky area of constitutional law.

13.   This became a murky area when it appeared that the networks, for monetary gain, could reshape scripts.

14.   But tactical weapons have always been a murky area.

15.   Murky areas of the Milky Way galaxy also are up for investigation.

16.   The action could prove a test case in the murky legal area where producer rights meet high technology.

17.   The Stock Exchange Management Law is intended to clear up murky areas of market management.