Graz School Create Classic editor Talk0 Category page This page needs content. You can help by adding a sentence or a photo. Add to this page!orSearch for "Graz School" “Object Theory is a theory in philosophy and mathematical logic concerning objects and the... Object theory Pages in category "Graz School" This category contains only the following page. O Object theory Retrieved from "http://psychology.wikia.com/wiki/Category:Graz_School"