So to properly support analogy, a taxonomy must provide a basis of abstracting not just to conventional categories, like Person, Animal or Tool, but to categories representing the specific causal behaviour of concepts such as think-agent, pain-experiencer, cutting-instrument, and so on.
a surgeon can be meaningfully described as a repairman since both occupations have the function of restoring an object to an earlier and better state; a footballer can be meaningfully described as a gladiator or a warrior since each exhibits competitive behaviour; and a scalpel can be compared to a sabre, a sword or a cleaver since each has a cutting behaviour; and so on.