51.  But the investigators cautioned that they have no hard evidence of the payments.

52.  But the police acknowledge they have no hard evidence against the men.

53.  But the tape presents the first hard evidence that Richard Nixon personally ordered a break-in as a means of gathering political intelligence on his enemies.

54.  But they gave no sense of having any hard evidence to back up this theory.

55.  But there is scant hard evidence that mergers, hostile or friendly, have in fact generated the promised efficiencies.

56.  But there is no hard evidence that Iran has ever shipped weapons either to the Palestinian Authority or to either of the anti-Israeli Palestinian groups.

57.  But these officials said they had seen no hard evidence that Panamanian officials did anything more than break the laws of their own country.

58.  But they offer no hard evidence.

59.  But with the modest amount of warming experienced so far, they have been unable to produce much hard evidence.

60.  Certainly, U.S. inaction in the face of hard evidence of terrorist activities would be irresponsible.