Archaic classification
Definition of language
'chair': 3-4 legs and some sort of seat
'chicken': two legs, beak, feathers, source of eggs
Selective use of characters
Subordination
Class defined by few characters
Characters not well defined
'Small' vs 'large'
Hierarchy (sometimes nested)
Animal |
mollusk |
gastropod |
Littorina |
Animal |
mollusk |
bivalve |
Mytilus |
Plant |
fruit |
berry |
strawberry |
Plant |
fruit |
berry |
blueberry |
Plant |
flower |
rose |
pink rose |
Plant |
flower |
tulip |
yellow tulip |
Rock |
metamorphic |
marble |
white Carrara |
Classification is not taxonomy!