There's some excuse of the media's and the gun grabber's confusion of clips and magazines. Both hold ammunition cartridges but to confuse the holders and the cartridges themselves?
Well Bob Owens finds a rocket scientist who has a hard time telling a cartridge from a clip.
Remember, these are the same folks who think you're too dumb to have a weapon, but they won't take a second to proofread and check what the terms they use actually mean.
Edit: Ah here's what I was thinking of the Gell-Mann Amnesia Effect.