It's more of a metaphor than an analogy, I guess. Metaphors like "he buttressed the argument" or "she was a rock of Gibralter" are especially powerful because t

It's more of a metaphor than an analogy, I guess. Metaphors like "he buttressed the argument" or "she was a rock of Gibralter" are especially powerful because they tap into our kinesthetic memories (ht George Lakoff). There's no meaningful depth to the idea that a bad Project Manager is like a front rudder of a boat, put it paints an image.