Wouldn't have believed it if I didn't experience it...
She comes in, attitude a-blazin', all upset that the printer we sold her about 3 months ago stopped working. She reports that the output from the printer just kept getting lighter and now it is all "faded and stripey-looking".
So I plug it in, print a test page and say:
"Huh. It looks like your just out of ink."
She cocks her head about 5 degrees to one side, just like the RCA dog, and offers a bottomless, blank stare. A drop of drool oozes from her over-painted lips, and she says, "What do mean, out of ink?"
Long story short, this "person" thought the ink fairies came and replenished the printer when she was asleep. Or perhaps she thought the printer didn't use ink at all, who knows.
I am continually amazed by the lack of understanding some people posess concerning the devices they rely on.