1.   A key issue was whether Hughes satellites were civilian or military, a murky question in the export control laws.

2.   Such cases, she said, raise murky philosophical questions.

3.   The answers are easy, says Dr. Christopher Comer, a biologist at the University of Chicago who obtained a National Science Foundation grant to solve such murky questions.

4.   Whether they can be accused of violating federal law is a murky question.

5.   Whether Chinese investors can buy B shares is a murky legal question.