Difference between --date-order and reverse chronological order?

Hi.

The git-log manpage defines --date-order:

"This option is similar to --topo-order in the sense that no parent
comes before all of its children, but otherwise things are still
ordered in the commit timestamp order."

But by Git's definition, for a child commit to be created, its parent
must already exist. So even in reverse chronological order, all
parents should come after all their children, no?

Thanks, D.