How to score sentence pairs for Bi-Encoder SBERT fine tuning

My task is to fine-tune Bi-Encoder SBERT ([https://www.sbert.net/](https://www.sbert.net/)) on custom data.

My custom data consists of \~100K short sentence pairs with similar meaning.

I create \~500K negative samples by negative sampling.

For Bi-Encoder SBERT fine-tuning I need a score for each pair. The only scores I have are 0 (for all negative samples) and 1 (for all positive samples).

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My question: Are those scores are good enough for fine tuning?

If not, how should I give a score for …

bi encoder languagetechnology