Part of an ongoing series.
From a report on recent Supreme Court oral arguments about partisan gerrymandering:
Breyer pointed out that all the tests “have slight variations on different themes”
The whole point of “variations on a theme” is to communicate that they are fundamentally the same, with some superficial differences. There is one theme, and all the distinct versions are slight “variations”, What does it mean to be “variations” if they are all on different themes?