Example sentences of "not known to be " in BNC.

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No Sentence
1 The extreme form of participant observation — what I have called the ‘ complete participant ’ — is , in fact , typified by the spy , who is believed by members of the group to be a genuine member of that group and is not known to be an observer at all .
2 Physical abuse is not known to be extensive and it may be felt that it has been excessively discussed in the context of ‘ dependence and independence ’ .
3 ‘ Very low risk ’ activity is not known to be a risk but could occasionally result in transfer of these body fluids to another person .
4 Saliva , tears and urine are not known to be infectious .
5 Case 1 — A man aged 84 , not known to be diabetic , presented with confusion , cough , and anorexia .
6 Users in this group were not known to be taking any drug other than cannabis ( though , like any drug user , they may have taken other drugs without official knowledge of this ) .
7 After one year 26 per cent of patients had ceased contact with services and were not known to be resident in the area .
8 A number are not known to be from previous material , and Wulfstan may have taken them from records of Cnut 's administration .
9 However , there are difficulties with latent defects , for example , characteristics not known to be harmful at the time of delivery , or immunities to harmful substances being subsequently discovered .
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