Sentence:  A test that shows that separateness is not a property of a substance is that "we cannot <WSD>abstract away</WSD> separateness" from our representation of a substance. Given a representation of a statue, we cannot do with "separateness" what we can do with "shape," that is, abstract it away. We cannot <WSD>abstract away</WSD> separateness and retain all other properties of the statue. Similarly, we cannot <WSD>abstract away</WSD> just the oneness of a statue and retain all else about it in our representation of it. 
Meaning of the word marked with <WSD> tags:  To generalize concepts or their application by using abstraction into a more usable form.