More documentation on silence detection in model.conf options

Hi,

I'm trying to make a model that can be used conversationally, so I want to reduce the latency as much as possible.

I've tried fiddling with the example model's parameters:

--endpoint.rule2.min-trailing-silence=0.5
--endpoint.rule3.min-trailing-silence=1.0
--endpoint.rule4.min-trailing-silence=2.0

But I'd like to know what other options exist (if any) and what they mean. For example, what's the distinction between rule 2, 3, and 4. Why is there no rule0 or rule1?

Some people run kaldi's config with the silence decreasing, like [this person](https://groups.google.com/g/kaldi-help/c/0iNqgIadglY). Has this person made a mistake?

Do you know of any resources where the possible model options are explained? Thank you :)