How do i create nested dependent fields?

I have a form, kinda like this that i want to set up with fields, but I can't seem to work out dependents of dependents:

option level 1
  |
  ----- sub option level 2.1
  ----- sub option level 2.2
       |
       ---- sub option level 3.2.1
       ---- sub option level 3.2.2
option level 2
... etc.

There are so many options for dependencies, but none of them seem to behave quite correctly.
Namely, the 3rd-level dependent appears (e.g. sub-option level 3.2.2) , even when its dependee does not (e.g. sub-option level 2.2).

Can i do this with core field dependencies?

If not, then this is probably a bug -- the UI should not allow me to configure such a dependency.