>Their names are made up, but they can be defined. What _ranks_ are given to
>those names is an _entirely_ subjective decision. Surely you have noticed
>that no two published classifications of any group are identical: that's
>because nobody can say that any classification is right or wrong,
really?
Yes. Two traditional taxonomists might agree on the exact same phylogenetic hypothesis, but each could come up with different classification. Examples:
Family Hylobatidae Genus Hylobates Family Pongidae Genus Gorilla Genus Pongo Genus Pan Family Hominidae Genus Homo
Family Hylobatidae Genus Bunopithecus Genus Hylobates Genus Nomascus Genus Symphalangus Family Hominidae Subfamily Ponginae Genus Pongo Subfamily Homininae Genus Gorilla Genus Homo Genus Pan