What does the 'Apply establishment means to descendent places' button (in check lists) actually do?

[thebeachcomber]

right, the first part of that does make sense

@jdmore

My understanding is that Introduced gets applied to descendant places with Unknown status without using that special tool – just automatically when the parent place gets changed to Introduced by anyone.

but the second part

@jdmore

And when the special curator tool is used, it will then change everything, not just the unknowns.

still doesn’t seem to align with the button’s message that it will explicitly not change everything?