Well... Now, that's not entirely accurate. Emmy can make a mistake. But only if the human element makes the mistake first.
12 seconds sound clip from the Desk Set (1957) movie soundboard.
You can hear this line at 01:24:37 in the Blu-ray version of the movie.
Quote context
[...]
- Now, these little cards create electronic impulses, which are accepted and retained by the machine
- And it never makes a mistake.
- Tell me, Bunny, has EMMARAC been helping you any?
- Well, frankly, it hasn't started to give yet.
- For the past two weeks, we've just been feeding it information.
- But I think you could say that it will provide more leisure for more people.
[...]