Example sentences of "not known for certain " in BNC.

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1 This table gives the numbers of each moneyer 's coins in each hoard ; an x denotes that these are not known for certain .
2 Exactly what happened is not known for certain , but the most likely scenario is that Crabb was intercepted by Russian frogmen and taken on board the Ordzhonikidze through a ‘ wet chamber ’ .
3 Even if the exact number of rounds in the game is not known for certain , in real life it is often possible to make a statistical guess as to how much longer the game is likely to last .
4 It is not known for certain at what moment of time afterwards she looked at her fingers , in order to gaze admiringly at the ring .
5 It is not known for certain if the male and female form a pair bond .
6 The exact date is not known for certain , but is either July 12th or 19th 1958 .
7 Although it is not known for certain whether Yazid was present at Karbala , he is cast by the Shiites as the author of the incident , and the name is to this day a favourite Shiite epithet for a Sunni adversary — it was used in this sense during the 1980s war by the Tehran leadership when referring to that in Baghdad .
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