Full Idea
The propositional belief which portrays what I see in front of me AS a field requires my having a concept of one.
Gist of Idea
To see something as a field, I obviously need the concept of a field
Source
Robert Audi (Epistemology: contemporary introduction [1998], I p.17)
Book Reference
Audi,Robert: 'Epistemology: a contemporary introduction' [Routledge 1998], p.17
A Reaction
To me this immediately invites the question of what a cow or horse experiences when they look at a familiar field. They know how to leave and enter it, and register its boundaries and qualities. Concepts?