Example sentences of "is [verb] for certain " in BNC.
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1 | Some other marines are reputed to be mouthbrooders , including Grammas and Jawfish , although little is known for certain about the breeding of many marine fish . |
2 | All that is known for certain is that Sigmar eventually put aside his crown and journeyed eastwards , supposedly to Karaz a Karak to meet his old friend Kurgan Ironbeard . |
3 | Little is known for certain about his early upbringing or education although we do know that John Howard was criticized for both neglecting him ( because of his many absences ) and for imposing an unduly repressive regime when he was at home . |
4 | No portrait of Bennet is known for certain to be extant . |
5 | , Walter ( fl. 1476–1499 ) , church musician and composer , Nothing is known for certain of his family , birth , and education ; there is no compelling reason to concur with speculation that the composer may be identifiable with the boy of this name who , having been born in Salisbury around 15 August 1451 or 1452 , was elected a King 's scholar of Eton College on 8 July 1467 . |
6 | ( fl. 1260–1278 ) , cartographic patron , is known for certain only as the author or at least the patron of the late thirteenth-century world map preserved in Hereford Cathedral . |
7 | Nothing is known for certain about his parentage and birth , but David Fallows has suggested that he may have been the same man as John Boddenham , born in Oxford in 1422 , chorister and scholar of Winchester College and later scholar and fellow of New College , Oxford . |
8 | A full survey of the Braer will be needed before it is known for certain no oil remains , but a survey can not be carried out until the weather is suitable , which could take up to three months . |
9 | There must therefore be another process at work affecting performance , a process which is engaged for certain tasks but not for others . |