11.   Scientists have inferred the existence of such faults under the city for many years but this is the first solid proof that one actually exists.

12.   So far, neither of the committees have turned up any solid proof of the veracity of the accusations.

13.   Some accused the White House of creating propaganda, offering a success story from a war-torn country where solid proof is hard to find.

14.   The experiments offer the first solid proof of the existence of human pheromones, compounds produced by one individual that can influence the biology or behavior of another.

15.   America attacked Afghanistan without giving any solid proof and to cover the failures of its spy agencies.

16.   But federal prosecutors and FBI agents have said they would require solid proof that the tapes were destroyed.

17.   But it has never provided solid proof.

18.   He said situations such as theirs explained why officials have been hesitant to list those missing as dead until they have solid proof.

19.   He stressed, however, that there was no solid archaeological proof of this.

20.   In most cases, there is no solid proof the Islamic regime ordered the assassinations.