Possibly the on / off switch, because that's a good analogy to stop and go, but I'm not sure that goes far enough.
The whole analogy of humans / living things to robots is probably both useful and dangerous at the same time, but then again that seems to be the whole situation with logic itself, so we've got to get used to that and be comfortable articulating the good and bad of it. I think that's pretty much "got to be" the approach Epicurus took.
We can't label "all abstractions are bad" - that would be ridiculous, but at the same time have to be just as firm that "the map isn't the territory itself."
Cliches can be tiring but I think assembling a list of them would probably help us talk about the subject and explain it more clearly.