Technically True
You should never quarrel with someone that has studied history; they know their stuff. In general, we’d advise against fighting with your girlfriend on any issues; she’s probably more intelligent than you are. More significantly, don’t argue that the Dark Ages got its name because electricity wasn’t discovered at the time with a history major.

However, there’s no denying that “the dark age” entails a period with no electricity. However, the term “dark ages” does not imply literal, physical darkness; it refers to mental darkness or to the economic, intellectual, and cultural decay that followed the fall of the Western Roman Empire.