Question about excluding system updates when using incremental export API

Hi guys, 

I used incremental export API to export tickets and met some some problems when tried to exclude system update records.
It the document, it said that `It also helps to know that the endpoint compares the start_time to the updated_at and generated_timestamp values. Therefore, any ticket in the results that was only updated by a system event or a database backfill will have a generated_timestamp that's later than the start_time but an updated_at time that's earlier than the start_time.`

So just want to confirm that does it mean: generated_timestamp > start_time && updated_at < start_time

How about in cases: generated_timestamp = start_time = updated_at?

Thanks and Best Regards