Can I use the pretrained BERT-Base model directly for predict isNextSentence task?
# ❓ Can I use the pretrained BERT-Base model directly for predict isNextSentence task?

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## Details
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I has a document-level corpus, but it don't have document boundaries.
I want to confirm that whether can I predict isNextSentence task by pretrained BERT-Base model? The model does not use any data finetune and don't mask any token when i used it. 
Is prediction reliable by this way?
I have find anwser in [code](https://github.com/huggingface/transformers/blob/master/src/transformers/modeling_bert.py#L1138).