Example sentences of "is [not/n't] proof " in BNC.

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No Sentence
1 But the existence of a quiet pro-American majority in Britain , France and Germany is not proof against big changes in attitudes to America 's role in the world .
2 This is not proof , of course , that there was no reasonable expectation of trouble ; the late announcement of the ban , however , gave credence to the assumption that it had only been prompted by the Apprentice Boys march , and that the Government , as in Dungannon , was allowing a loyalist organisation to manipulate the situation so that an opposition demonstration would be banned .
3 Cellulose is not proof against attack and it was reckoned that a new car 's shine would be ruined in about two years .
4 This is not proof in itself that our ancestors were more intelligent than we are : it seems that the ability of a brain depends less on its size than on the extent of its complexity , as epitomized by the degree of crenulation ( folding ) on its exterior .
5 It provides a check on the arithmetical accuracy of the double entry , but it is not proof that the transactions have been correctly recorded .
6 If that is not proof I .
7 If that is not proof of lack of investment , what is ?
8 Even this is not proof against all errors .
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