[twhb]

I think you’re certainly correct, but remember that the question wasn’t just about understanding mirrors, but using mirrors to make a point about bias. “A mirror image is swapped left to right” doesn’t appear to be biased at all, and yet it is.

Also, just for fun: what makes calling it swapped front to back more valid than left to right? One could recover the (translated, rotated) original image through any of a front to back swap, left to right swap, or top to bottom swap. They’re all lenses, and equally valid.