11.   There is no hard evidence of files spirited away and even if they were, nobody knows whether they contain anything sinister.

12.   There is no hard evidence to support this theory.

13.   There was no hard evidence to support the theory.

14.   They have no hard evidence to support their claim.

15.   This was a pseudo-historical theory for which there was no hard evidence.

16.   To what extent is it founded on hard evidence?

17.   But there was something else, too.

18.   Not hard evidence, but it made me wonder.

19.   In both instances the allegations against the candidates lacked hard evidence and relied upon repetition through television advertising.

20.   It is an aspect of performance practice where several cogent arguments can always be trotted out to avoid considering the hard evidence.