Why check "Create new baselines" when creating a new snapshot in RTC source control

When creating a new Snapshot what difference does checking "Create new baselines" make ?

If this is unchecked, a snapshot is created and all components in the snapshot are backed up and so created baselines ?

If this is checked then new baselines are created but they also seem to be created when "Create new baselines" is checked.

As per this thread

A snapshot is just a set of baselines (each baseline from a different component). It's what ClearCase would call a "composite baseline".

You can snapshot the state of either a workspace or a stream, whichever you prefer. That will automatically create baselines when needed, i.e., when the current configuration of a component in that workspace/stream is not currently captured in a baseline

So, as mentioned in this thread

When I create a new snapshot, it only create new baselines in changed components, not in components have no changes.

I suspect checking in "Create new baselines" will force the creation of baselines for all components, including the ones which were already at baseline.

That enforces consistency in the name of the baselines included in the snapshot.

Update Jan. 2018, 3+ years later: Dmitry Grigoryev mentions in the comments:

the label on that checkbox is much more clear in newer releases now