Example sentences of "[conj] if [pron] know that " in BNC.

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1 We can surely conclude that if you know that you are sitting reading , you know that you are not a brain in a vat , and hence ( by simple modus tollens ) that since you do n't know that you are not a brain in a vat ( agreed above ) you do n't know that you are sitting reading .
2 ‘ The people are mightier than a lord , and if we know that , we — can — not — be — put — down . ’
3 If we see there 's quite a few on the walkways , and if we know that they 're outsiders then we 'll we 'll turn round and we 'll walk back the other way .
4 the funny thing is that if if you know that what you 've got on your head is something acrylic , then you ca n't feel all that good about yourself .
5 But if you know that person , you can generally disentangle what 's really happening from the rest .
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