31.   But determining what causes a behavior can be even more complicated than determining the cause of a disease.

32.   But inspectors were not ruling out either pilot error or weather factors, and cautioned that it was too early to determine the cause.

33.   But it said it could not determine the cause of death until chemical and other tests were completed.

34.   But safety board personnel say that a short delay will make no difference in their ability to determine the cause.

35.   But that report was unable to determine the cause of the fuel starvation.

36.   But the Navy has a good record for finding black boxes, and the investigators have a good record in using them to determine the causes of crashes.

37.   But the study was not designed to determine the cause of any such biases, the authors said.

38.   But the results vary widely from team to team, and researchers have been slow to do the broader experiments needed to determine the cause of the problems.

39.   But they still had not determined the cause of the fire, which took the life of Firefighter Louis Valentino when the roof collapsed.

40.   By Monday afternoon, investigators had not entered the building to determine a cause for the fire.