 Our topic in this section is the thing/property or object/non-object (henceforth, the ‘object/property’) distinction—as opposed to the precise nature of either objects (see  §3)  or properties. We will thus elide some terminological details. Instead of treating only theories of the object/property distinction phrased precisely in those terms, we will canvas several attempts to make sense of other nearby distinctions as well—most notably the substance/attribute distinction and the universal/particular distinction.