Following Touretzky, we will define the "fixed inheritance" structure of a lexical item as follows, where "Q" and "P" are concepts in our model of lexical organization. Then: "Definition 4.1". A sequence <"Q1", "P1",..., "Pn"> is an "inheritance path", which can be read as the conjunction of ordered pairs {<"x1", "y1">| 1 ≤ "i" ≤ "n"}. - Pustejovsky & Boguraev (2004), a pag.353