Wiktionary
abstract types
n. (plural of abstract type English)
Usage examples of "abstract types".
Perhaps it is not altogether useless to point out plainly that in concrete reality these various cosmogony myths are not so sharply opposed as they are in the abstract types in which we have classified them.
It appears in the endless multiplication of his personality into abstract types which mythology strives to make concrete.
Instead, you made the classic mistake of categorizing people into abstract types instead of recognizing their concrete variations.