This objection helps to reveal why it is that we regard a hierarchical classification as natural.

The goal is to create an easily accessible database with reliable information on species names and their hierarchical classification.

Another key advance, less generally appreciated, is a set of rules for naming groups within any hierarchical classification.

These early taxonomic conlangs produced systems of hierarchical classification that were intended to result in both spoken and written expression.

Eusociality is the highest level of social organization in a hierarchical classification.

It includes scientific and common names, hierarchical classifications, historical documentation, and expert citations for each name.

The hierarchical classification of articles for a subject can be used to locate an article.

Most existing species can be organized rather easily in a nested hierarchical classification.

Those were systems of hierarchical classification that were intended to result in both spoken and written expression.

Others believe that the hierarchical classification may not serve much purpose.