Parallel voltage sources circuit

[Femme_physics]

Yes. It's groundless.

Is this like our "circuit flowing in space" idea? Not connected to ANYTHING!

The problem with those statements is, that Vcd will still equal whatever you calculated, even if Vc is not zero (since Vcd is a "difference").

So in other words I don't have to define anything as my "zero" point. Duly noted!