I don't think any one person was first to make this observation (and I would think of it more as an observation that argument). Notice that classification has a mataphorical aspect. Whoever 'first' spoke of mammals had noticed that rabbits are foxes and chipmunks are elephants and they are all hyenas (at least from one aspect -- and that is all a metaphor ever does, it asserts that A is B _in respect to Q_).
Carrol Jim Devine wrote: > > who was it who argued that our thinking always (almost?) involves > similes and metaphors?
