|Similarity: conformity of one or more - but not all - properties of two or more objects.|
Books on Amazon
|Mayr V 190
Similarity: Darwin counts it among the classification criteria, because there is no absolutely direct relationship between branching and divergence.
In some trunks, all branches diverge about to the same extent.
Language/Evolution: also languages evolve, but not adaptively, but stochastically!E.g. When the Anglo-Saxons colonized the British Isles, they did not have to adapt the language to the climate. The consideration of ecological factors and their effects on the phenotype characterize a Darwinian classification.
Similarity/Mayr: must be ascertained as a first step, then the genealogy.
Das ist Biologie Heidelberg 1998