1.   Although some football players have said artificial turf causes more injuries, the assertion is often refuted by team management and ownership.

2.   And just exactly what facts do they offer to refute my assertion?

3.   A Los Angeles city attorney refuted the assertion.

4.   Gov. Pedro J. Rossello has said he would support the project unless opponents could refute Navy assertions that the radar posed no health risk.

5.   Those assertions were quickly refuted by the White House.

6.   But critics of Indonesia would certainly refute that assertion.

7.   The Journal vigorously refuted the assertions and, in an unusual move, the Central Intelligence Agency has publicly denied that Pearl was or is an employee.

8.   The Journal, however, vigorously refuted these assertions.